Plausible though it sounds the weakness of the hypothesis is that it does not incorporate all releva...........

General Knowledge (CLAT) Sentence Improvement

Direction: In each of the following sentences, some part of the sentence or the entire sentence is underlined. Beneath each sentence, you will find four ways of phrasing the underlined part. Choose the most appropriate option given in each of the sentences given below that is the best version than the underlined part of the sentence.

Plausible though it sounds, the weakness of the hypothesis is that it does not incorporate all relevant facts.

The weakness of the hypothesis which sounds plausible.

Though the hypothesis sounds plausible, its weakness

Even though it sounds plausible, the weakness of the hypothesis

Though plausible, the hypothesis’ weakness

Explanation:

Though the hypothesis sounds plausible, its weakness is that it does not incorporate all relevant facts.
In 1, a coma is required after “hypothesis” since “which” is being used.
In 3, “it” illogically refers to “weakness” instead of “hypothesis”.
In 4, “plausible” refers “weakness”.
So, it's only option 2, that seems correct.
Though the hypothesis sounds plausible, its weakness.