Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
Statements:
Some dolls are rockets.
Some rockets are engines.
All engines are solids.
Conclusions:
I. No doll is solid.
II. No solid is an engine.
III. Some dolls are solid.
IV. No engine is a rocket.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Either conclusion I or III follows.
Conclusions:
I. No doll is solid. - Does not follow (There is no direct relation between doll and solid. So, it is possible but not definite)
II. No solid is an engine. - Does not follow (It is possible but not definite)
III. Some dolls are solid. - Does not follow (There is no direct relation between doll and solid. So, it is possible but not definite)
IV. No engine is a rocket. - Does not follow (because Some rockets are engines. So, No engine is a rocket is false)
Here, Either conclusion I or III follows.