Three statements are given, followed by three conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow from the statements.
Statements:
No telegram is a telephone.
All postcards are telegrams.
All envelopes are telegrams.
Conclusions:
I. Some postcards are telephones.
II. No envelope is a telephone.
III. No telephone is a postcard.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2, i.e., Only conclusions II and III follow.
Conclusions:
I. Some postcards are telephones → Does not follow (Not given direct data about both.)
II. No envelope is a telephone → Follows (All envelopes are telegrams, which are not telephone, definitely no envelopes are telephone.)
III. No telephone is a postcard → Follows (No Telephones is telegram, and all postcards are in telegram. So, no relation between telephones is postcards.)