The correct option is B Collecting duct
Nephron is the structural and functional unit of kidney.
A nephron is a long tubular structure, which is differentiated into four regions having different anatomical features and physiological role.
The tuft of capillaries formed by the afferent arteriole is called glomerulus. It is enclosed within the Bowman's capsule. The capsule leads into the renal tubule part.
The renal tubule cosists of proximal convoluted tubule (PCT), loop of Henle, and distal convoluted tubule (DCT).