The majority of people waiting for trial outside the Red Fort and criticising…

Concept — how a literal-comprehension item is settled: In a reading-comprehension question the correct choice is the one the passage itself asserts, not the one that outside knowledge or the general drift of the narrative suggests. The working method is to locate the single place in the text that carries every element named in the question, and then read that place literally.

Application to this passage: The question names two elements together — the people awaiting trial in the Red Fort, and criticism of Jinnah. Only one place in the passage carries both: the journalist B. Shiva Rao's report of his 20 November 1945 visit to the Red Fort prisoners — “A majority of the men now awaiting trial in the Red Fort is Muslim. Some of these men are bitter that Mr. Jinnah is keeping alive a controversy about Pakistan.” The first sentence fixes the composition of that majority, and “these men” in the second sentence refers back to the same group, so the people voicing criticism of Jinnah are drawn from it. The answer is therefore Muslims.

Cross-check against the other values:

• Hindus: the passage mentions a Hindu only as P.K. Sehgal, one of three officers deliberately placed on the dock together. One named individual is not a statement about who formed the majority of those awaiting trial.

• Sikhs: in the same way Gurbaksh Singh Dhillon is named as the Sikh among those three officers; the passage makes no claim anywhere about Sikhs forming the bulk of the prisoners.

• Hindus and Muslims both: the journalist's majority statement names a single community. The nearby line that “there is not the slightest feeling among them of Hindu and Muslim” reports the absence of communal division among the prisoners; it does not describe the majority as jointly Hindu and Muslim.

Result: Muslims.