Read the given statement(s) and conclusions carefully. Assuming that the information given in the statement(s) 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 statement(s).
Statements:
1. Some buns are croissants.
2. Some croissants are donuts.
Conclusions:
I. Some buns are donuts.
II. All donuts are croissants.

Statements:
1. Some buns are croissants.
2. Some croissants are donuts.

Conclusions:
I. Some buns are donuts. (False, there is no direct connection between buns and donuts).
II. All donuts are croissants. (False, statement only says some croissants are donuts. This does not mean all donuts are croissants).

So, neither conclusion I nor II follows.

Thus, correct option is (c).