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Railways PYQCBT 1 2016

RRB NTPC · Question 1

Read the statements and select a conclusion from the given alternatives: Statements: All apples are leaves. Some leaves are lemons. No lemon is house. Conclusions: I. Some houses are apples. II. Some lemons are apples. III. No house is apple.

  1. Only I follows

  2. Only II follows

  3. Only III follows

  4. Either I or III follows

Show answer & explanation

Answer: (D) Either I or III follows

Explanation

Apples lie inside leaves, and only some leaves are lemons, so we cannot say whether any apple is a lemon or a house. 'Some houses are apples' (I) and 'No house is apple' (III) cannot both be false: they form a complementary pair, so either I or III follows. II does not follow.