Three Statements are given followed by Three conclusions numbered I, II and III. 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(s) from the statements.
Statements:
All keys are windows.
No window is a door.
Some doors are locks.
Conclusions:
I. Some locks are keys.
II. No lock is a window.
III. No door is a key.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Only conclusion III follows.
Conclusions:
I. Some locks are keys. - Does not follow (it is possible but not definite)
II. No lock is a window. - Does not follow (it is possible but not definite)
III. No door is a key. - Follows (because All keys are windows and No window is a door. So, No door is a key too)