Three statements are given, followed by three conclusions numbered I, II and III. 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. No Boy is a Singer.

2. All Singers are Musicians. 

3. All Musicians are Actors.

Conclusions:

I. All Musicians cannot be Boys.

II. All Boys are Actors.

III. No Actor is a Boy.