In a group of seven friends Mysha, Myra, Heer, Tia, Yash, Sia and Aarav each has a different height. Sia is third tallest among her friends. Mysha is third shortest among the friends. Aarav is taller than Yash and Sia. Heer and Tia are shorter than Myra. Aarav is not the tallest in the group. Who is the tallest of them all?

A

Heer

B

Yash

C

Myra

D

Tia