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Question

In each question below are given some statements followed by four conclusions numbered I, II, III and IV are given. You have to take the three given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions logically follows from the four given statements, disregarding commonly known facts.

Statements:

All M are K.

All K are J.

All L are J.

No L is a P.

Conclusions:         

I. No K is L.

II. Some K are L.

III. Some J are M.

IV. Some L are M.

A Only either I or II follows Correct Answer Incorrect Answer
B Only either I or IV and II follow Correct Answer Incorrect Answer
C Only III follows Correct Answer Incorrect Answer
D Only either I or II and III follow Correct Answer Incorrect Answer

Solution

All K are J(A) + Some J are  L(I) ⇒   No conclusion. Hence conclusion I and II does not follow but they will make a complementary pair. Hence either conclusion I or II follows. All M are K(A) + All K are J(A) ⇒ All rose are marigold(A) ⇒ Conversion ⇒   Some J are M(I). Hence conclusion III follows. All M are K(A) + All K are J(A) ⇒ All M are J(A) + Some J are L(I) ⇒ No conclusion. Hence conclusion IV does not follow.

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