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Given below are two premises (a and b). From those two premises four conclusions (i), (ii), (iii) and (iv) are drawn. Select the code that states the conclusion/conclusions drawn validly (taking the premises singularly or jointly). Premises : (a) All bats are mammals. (b) No birds are bats. Conclusions : (i) No birds are mammals. (ii) Some birds are not mammals. (iii) No bats are birds. (iv) All mammals are bats.

Given below are two premises (a and b). From those two premises four conclusions (i), (ii), (iii) and (iv) are drawn. Select the code that states the conclusion/conclusions drawn validly (taking the premises singularly or jointly). Premises : (a) All bats are mammals. (b) No birds are bats. Conclusions : (i) No birds are mammals. (ii) Some birds are not mammals. (iii) No bats are birds. (iv) All mammals are bats. Correct Answer (iii) only

The least possible venn diagram is:

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(i) No birds are mammals. → False (It can be possible, but it is not definite)

(ii) Some birds are not mammals. → False (It can be possible, but it is not definite)

(iii) No bats are birds. → True (It is definite)

(iv) All mammals are bats. → False (It can be possible, but it is not definite)

Hence, ‘(iii) only’ is the correct answer.

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