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Railways PYQCBT 1 2020

RRB NTPC · Question 93

You are given 3 sets of arguments, each containing three sentences. Select the set(s) in which the third statement is a logical conclusion of the first two statements. A. (i) All shops are showrooms. (ii) No showroom is a mall. (iii) All shops are not malls. B (i) No Japanese can dance. (ii) All Americans are books. (iii) Americans and Japanese can dance. C. (i) No P is Q. (ii) No Q is R. (iii) No P is R.

  1. Only C

  2. Only B and C

  3. Only B

  4. Only A

Show answer & explanation

Answer: (D) Only A

Explanation

In A, shops lie within showrooms and no showroom is a mall, so no shop is a mall – the conclusion follows. B's conclusion contradicts its premise, and in C two negative premises give no conclusion. Only A.