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Three statements are given, followed by three conclusions numbered I, II and II. Assuming the statements to be true, even if they seem to be at variance with the commonly known facts, decide which of the following conclusions logically follow(s) from the statements. Statements: I. Some dolphins are whales. II. All whales are mammals. III. Some mammals are fish Conclusions: I. Some dolphins are fish. II. No whale is fish. III. Some mammals are dolphins.

Three statements are given, followed by three conclusions numbered I, II and II. Assuming the statements to be true, even if they seem to be at variance with the commonly known facts, decide which of the following conclusions logically follow(s) from the statements. Statements: I. Some dolphins are whales. II. All whales are mammals. III. Some mammals are fish Conclusions: I. Some dolphins are fish. II. No whale is fish. III. Some mammals are dolphins. Correct Answer Only Conclusion III follows

The least possible Venn Diagram is as follows:

[ alt="F1 A.M 6.1.20 Pallavi D24" src="//storage.googleapis.com/tb-img/production/20/02/F1_A.M_6.1.20_Pallavi_D24.png" style="width: 289px; height: 114px;">

Conclusion:

I. Some dolphins are fish → False (It is possible but not definite)

II. No whale is fish → False (It is possible but not definite)

III. Some mammals are dolphins → True (those whales which are mammals as well as dolphins)

Hence, only conclusion III follows.

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