Three statements are given, followed by two 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(s) from the statements.
Statements:
1. Some avalanches are precipitations.
2. Some cataclysms are avalanches.
3. All avalanches are storms.
Conclusions:
I. Some storms are cataclysms.
II. No precipitation is storms.

Correct option is D

Conclusions:
I. Some storms are cataclysms. (True, some parts is common)
II. No precipitation is storms. (False, clearly showing common part between them so negative relation is wrong)

Only I is true.