The correct option is B Glomerulus
In a nephron, glomerulus is a network of small blood vessels (capillaries) located at the beginning of the nephron in the kidney. It helps in the filtration of blood. It is enclosed by a cup shaped structure called Bowman's capsule.
The filtrate after leaving the Bowman's capsule passes through the renal tubule in the following order - proximal convoluted tubule, the loop of Henle, distal convoluted tubule and then the collecting duct.