Area of picture = 16x Area of frame = 33x

Area of picture / (Area of picture + area of frame) = 16x / 49x = 4x/7x.

This results in c value to be a multiple of 1.5 = multiple of 3/2 and since c is not constrained to be only integer all the three choices are possible

For i) the multiple of c is 4/3

For ii) the multiple of c is 7/3

For iii) the multiple of c is 10/3

The key is c can be any real positive number... very tricky problem.. took me > 15 minutes.

Answer is E//kudos please, if this explanation is good

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