Three statements are given, followed by four conclusions numbered I, II, II and IV.
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:
No blue is red.
Some green are red.
All yellow are green.

Conclusions:
I. Some yellow are red.
II. No yellow is red.
III. Some green are blue.
IV. No green is blue.