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 conclusion logically follow(s) from the statements.

Statements:

All pink are brown.

Some brown are black.

Some black are blue.

Conclusions:

I. Some blue are not pink.

II. All black are brown is a possibility.

III. No blue are black.

IV. Some black are not pink.