The figure given below is the diagrammatic sectional view of mammary gland. identify $\mathrm{A}$ to $\mathrm{D}$ respectively

The events of the menstrual cycle are represented below. Select the right option in which the level of $\mathrm{FSH}, \mathrm{LH}$ and progesterone are mentioned correctly

The following graph represents the concentrations of the four hormones present in the blood plasma of a women during her menstrual cycle. Identify the hormones

When did the structure labelled $\mathrm{B}$ in the following diagram start to form

Which stage of the menstrual cycle is characterized by the event labelled $\mathrm{A}$ in given diagram