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:
(1) All pianists are musicians.
(2) All musicians are singers.
(3) No singer is a composer.
Conclusions:
(1): No pianist is a composer.
(II): Some singers are pianists.

​Statements:
(1) All pianists are musicians.
(2) All musicians are singers.
(3) No singer is a composer.

According to the statements, Venn diagram will be:

Let's analyze the conclusions:

Conclusions (I): No pianist is a composer. (True, Since all pianists are singers, and no singer is a composer) 
Conclusions (II): Some singers are pianists. (True,  All pianists are singers → means some singers are definitely pianists)

Thus, the correct option is (b) Both conclusions (I) and (II) follow.