Skeletal muscle! (or striated muscle).
There are only 6 days during any cycle when a women can get pregnant. the 5 days leading up to ovulation and a complete day after . This is because sperm can live up to 5 days in a women's body . So when she is ovulating it is most likely.
Its either A or C. thats all i can say though but B and D you can rule out. I hope i helped a little
I think number the first one iss grape fruit and the other one is cerebellum
