Mammary ampulla which is connected to .

Assertion (A): Generally, a woman does not conceive during the lactation period

Reason (R): The hormone 'Prolactin' initiates and maintains lactation in a delivered woman

The hormone which stimulates the 'let down' release of milk from mother's breast when the baby is suckling:

A sectional view of mammary gland shows:

(i) nipple + areola
(ii) mammary lobe, alveolus and duct
(iii) antibodies + pectoralis major muscles + ribs
(iv) ampulla + lactiferous duct

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$