Statements:
Some A are B.
No B is C.
Some C are D.
Conclusions:
(I) Some B are D.
(II) Some A are D.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Neither I nor II follows
A conclusion follows only if it is true in every diagram that fits the statements. “Some A are B” and “Some C are D” make those pairs of circles overlap, and “No B is C” keeps B and C apart; nothing at all is said about D and A or D and B.
Conclusion (I) (Some B are D) does not follow: the D circle can be drawn away from B, as above, and the diagram still fits all three statements.
Conclusion (II) (Some A are D) does not follow: in the same diagram D also does not touch A.