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 trucks are buses.
Some buses are bikes.
All bikes are planes.
Conclusions:
I. Some planes are buses.
II. Some buses are trucks.
III. All planes are trucks.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4, i.e., Only conclusions I and II follow.
Conclusions:
I. Some planes are buses → Follows (Some buses are bikes and all bikes are planes, so which parts of a bus are in a bike become a plane.)
II. Some buses are trucks → Follows (All trucks are buses, so definitely some buses are trucks.)
III. All planes are trucks → Does not follow (Not given direct relation between them.)