The correct option is D Glomerulus
Nephrons are the cells of kidney which are composed of a renal corpuscle and a renal tubule. The renal corpuscle is also known Malpighian body. It consists of cup like double walled structure known as Bowman’s capsule and the bunch of capillaries present in the Bowman’s capsule is known as glomerulus. The blood enters the glomerulus under high pressure from the afferent arteriole and leaves through efferent arteriole. Due to the high pressure in the glomerulus the blood gets filtered.The rate at which blood is filtered through all of the glomeruli, and thus the measure of the overall renal function, is the glomerular filtration rate. So the correct answer is “glomerulus”.