Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Milk is sucked out of the human mammary gland through the lactiferous duct. Reason (R): Several mammary ducts join to form a wider mammary ampulla which is connected to the lactiferous duct. In the light of the above statements, choose the most appropriate answer from the options given below:

Step-by-step solution

Assertion (A) is true: The lactiferous duct is the terminal duct in the mammary gland pathway through which milk is ultimately sucked out. Reason (R) is true: The structural hierarchy dictates that several mammary ducts join to form a wider mammary ampulla, which then connects to the lactiferous duct. However, Reason (R) is not the correct explanation for Assertion (A). Milk is sucked out through the lactiferous duct because it opens to the exterior at the nipple, not merely because the ampulla connects to it upstr