In each question below some statements are given followed by some conclusions. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions definitely follows from the given statements, disregarding commonly known facts. Give an answer.

Statements:
Some Shells are Sand.
All Sand are Pebbles.
Only a few Pebbles are Stones.
Conclusions:
I. Some Sand are Stones.
II. All Stones are Pebbles is a possibility.

Correct option is B

Explanation:
I. Does not follow: There is no direct relation between Sand and Stones. So, definite relation does not follow.
II. Follow: All Stones can be Pebbles in the case of possibility.