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# Art historians are using a process known as infrared

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VP
Joined: 17 Jun 2008
Posts: 1325
Art historians are using a process known as infrared [#permalink]

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12 Oct 2008, 05:19
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Art historians are using a process known as infrared scanning in analyzing the Mona Lisa to determine if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done by many artists of the time.

(A) if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done
(B) if it had been altered since completion and if Leonardo da Vinci first sketched the figure in black, a practice employed
(C) whether it has been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice employed
(D) whether it was altered since completion and whether Leonardo da Vinci first sketched the figure in black, as was done
(E) whether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done
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SVP
Joined: 29 Aug 2007
Posts: 2453

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12 Oct 2008, 12:32
spriya wrote:
Art historians are using a process known as infrared scanning in analyzing the Mona Lisa to determine if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done by many artists of the time.

(A) if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done
(B) if it had been altered since completion and if Leonardo da Vinci first sketched the figure in black, a practice employed
(C) whether it has been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice employed
(D) whether it was altered since completion and whether Leonardo da Vinci first sketched the figure in black, as was done
(E) whether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done

(C) whether is required to express the choice/option. "Since" requires "has been".
"A practice" modifies "whether Leonardo da Vinci first sketched the figure in black".
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VP
Joined: 17 Jun 2008
Posts: 1325

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13 Oct 2008, 00:30
GMAT TIGER wrote:
spriya wrote:
Art historians are using a process known as infrared scanning in analyzing the Mona Lisa to determine if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done by many artists of the time.

(A) if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done
(B) if it had been altered since completion and if Leonardo da Vinci first sketched the figure in black, a practice employed
(C) whether it has been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice employed
(D) whether it was altered since completion and whether Leonardo da Vinci first sketched the figure in black, as was done
(E) whether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done

(C) whether is required to express the choice/option. "Since" requires "has been".
"A practice" modifies "whether Leonardo da Vinci first sketched the figure in black".

OA is C
Thanks tiger !!
whenever since w need to use past/present particple ,i repeated the same mistake
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Its Now Or Never

Re: Sc-historians   [#permalink] 13 Oct 2008, 00:30
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