Three statements are given followed by two conclusions numbered I and II. 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:
All birds are crows.
Some crows are parrots.
No crow is a pigeon.

Conclusions:
I. No parrot is a pigeon
II. Some birds are parrots.

A

Only conclusion I follows

B

Both conclusions I and II follow

C

Neither conclusion I nor II follows

D

Only conclusion II follows