Option (d) is the correct answer because the components of mammary gland (from proximal to distal) is:

(c) $\to$ (e) $\to$ (a) $\to$ (d) $\to$ (b)

$$\mathrm{Alveoli} \to \mathop {\mathrm{Mammary}}\limits_{\mathrm{tubules}} \to \mathop {\mathrm{Mammary}}\limits_{\mathrm{duct}} \to \mathop {\mathrm{Mammary}}\limits_{\mathrm{ampulla}} \to \mathop {\mathrm{Lactiferous}}\limits_{\mathrm{duct}} $$

Each mammary lobule is composed of a number of alveoli which open into mammary tubules. The tubules of each lobule join to form a mammary duct. Near the nipple, mammary ducts expand to form mammary ampullae where some milk is stored before going to lactiferous duct which is present at distal end through which milk is sucked out.