Read the given statements and conclusions carefully. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. You have to decide which conclusion/s logically follow/s from the given statements.
Statements:

(I) Some schools are big.

(II) All big are malls.

(III) No mall is cheap.
Conclusion

I: All big are schools.
II: Some malls are big.​​

Given:

Statements:

(I) Some schools are big.

(II) All big are malls.

(III) No mall is cheap.

From the given following Venn diagram will be - 

Conclusion I: All big are schools (False, we have information about some big which are schools but we do not have other some big are schools or something else so we cannot find any definite relation between them )
Conclusion II: Some malls are big.(True, in the some part of mall are big )

Correct answer is (b) Only conclusion (II) is follow.​​