Question

All needles are threads, All threads are boxes. All trees are boxes. (A) No needle is tree. (B) Some trees are threads (C) Some boxes are needles (D) Some trees are needles

Choose the correct answer from the options given below:

Accepted Answer

D. From "All needles are threads" and "All threads are boxes", we get "All needles are boxes". By conversion, "Some boxes are needles" is definitely true (C). None of the other conclusions logically follow.

Syllogism Needles and Threads

Explanation

Practise this under exam conditions