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Question

In each of the questions below are given three statements followed by three conclusions numbered I, II and III. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of given conclusions definitely does not follow logically from the given  statements disregarding commonly known facts.

Statements : All dens are cattle.

  Some cattle are cows.

No cow is a horse.

Conclusions:I. All dens are not horses.

II. Some cows are not cattle.

III. Some horses are cows.

A If only conclusion I does not follow. Correct Answer Incorrect Answer
B If only conclusion II does not follow. Correct Answer Incorrect Answer
C If only conclusion III does not follow. Correct Answer Incorrect Answer
D If both conclusion I and II do not follow. Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

All dens are cattle(A) + Some cattle are cows(I) ⇒ No conclusion. Hence conclusion I does not follow. Some cattle are cows(I) ⇒ Conversion ⇒ Some cows are cattle(I). Hence conclusion II does not follow. No cow is a horse(E) ⇒ Conversion ⇒ Some horses are not cows(O). Hence conclusion III does not follow. ALTERNATE SOLUTION: Minimal possibility: 

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