
My pick of all is A because of the body shape. she has a good thick body down the length of this koi also the shiro from what I can see in the pic is good and the hi is not messy, it is still a young koi and needs time to finish, the pattern on this koi catches your eyes and the yellowing in the head should improve as the koi ages, The tail tube on this koi is very thick with a good clean break before tail fin. I think in time this koi will be your best koi of the koi in the pics. You can see the specks in the hi indicating the koi is still young and growing.

got a great body on that koi.