Amidst the constant turbulence of daily life, the artist
contemplated about his latest masterpiece, which he had been working on since the last six months, hoping to perfect it before the art exhibition.
"Amidst the constant turbulence of daily life" is a prepositional phrase that sets the context
"hoping to perfect it before the art exhibition" is a participial phrase that acts as a modifier, and it modifies the main clause "The artist has/had been contemplating his latest masterpiece." It expresses the purpose or intention behind the artist's contemplation.
since the last six months vs for the last six months - though since is mostly used to indicate a starting point till now, here the phrase - "since the last six months" indicates duration akin to the phrase "for the last six months" does.
A. contemplated about his latest masterpiece, which he had been working on since the last six months, hoping to perfect it before the art exhibition.
incorrect - usage of preposition 'about' after contemplated is incorrect.
B. has been contemplating his latest masterpiece, which he had been working on since the last six months, hoping to perfect it before the art exhibition.
correct - This sentence is correct and well-structured. The artist has completed the work on his latest masterpiece in the last six months. However, he has been contemplating his latest masterpiece, hoping to perfect it before the art exhibition -gives the intended meaning.
C. had contemplated his latest masterpiece, which he had been working on since the last six months, hoping to perfect it before the art exhibition.
incorrect - the past perfect tense for "contemplate" is incorrect.
D. had been contemplating his latest masterpiece, which he has been working on since the last six months, hoping to perfect it before the art exhibition.
incorrect - Option D mixes the past perfect tense "had been contemplating" with the present perfect progressive tense "has been working on", which creates a tense inconsistency.
E. had been contemplating his latest masterpiece, which he had been working on for the last six months, hoping to perfect it before the art exhibition.
incorrect - It uses the past perfect progressive tense "had been contemplating" which implies he is no more contemplating to perfect his masterpiece.
Answer B