Question

In each question below are either two or three statements followed by two conclusions I and II. You have to take the two/three given statements to be true and then decide which of the given conclusion logically follows from the two/three given statements, disregarding commonly known facts.

Statements:-
All A are Z.
All Z are X.
All Y are A.

Conclusions:-
I. All A are Y.
II. All Y are X.

• A. Only conclusion I follows
• B. Only conclusion II follows
• C. Either conclusion I or II follows
• D. Neither conclusion I nor II follows
• E. Both conclusions I and II follow

Answer 1

The correct option is B Only conclusion II follows

Mediate term of the following are
All A are Z (A-type)
All Z are X (A-type)
$A+A\to A-type$
All A are X........(i)
Another Medaite term
All Y are A. (A-type\)
All A are Z. (A-type)
$A+A\to A-type$
All are Z.......(ii)
Another mediate term is
All Y are Z. (A-type)
$\therefore$ From Eq. (II)
All Z are X.
$A+A\to A-type$
All Y are X.
(Conclusion II true)

So, only conlusion II follow.