Study the flow chart. Name the hormones labelled as $A, B, C, D$ at each stage.

$A \quad B\quad C \quad D$

Which part of ovary in mammals acts as an endocrine gland after ovulation?

Which of the following is not evident that the pattern of cleavage is determined by factors in the egg cytoplasm rather than by genes of zygote

Fertilizins are the substances emitted from

Site of fertilization in a mammal is ……