The correct option is D renal calculi
Kidney stones are deposition of insoluble salt crystals inside the kidney. The other term for kidney stones is renal calculi. Stones in the kidney can cause severe abdominal pain, fever, blood in urine, vomiting, backache etc. Most people undergo surgery to remove kidney stones.
Renal failure or kidney failure is the condition when kidneys stop functioning. Renal failure can be sudden in case of acute renal failure or gradual in case of chronic renal failure. The ultimate method to rectify the acute renal failure is by kidney transplant.
Kidney transplant or renal transplant is transfer of functional kidney from a donor to recipient thus replacing the damaged kidney.
Nephrons are the functional and structural unit of kidneys. Each nephron has the glomerulus and the renal tubule. Glomerulus is a tuft of capillaries formed by the afferent arteriole. The renal tubule is made up of Bowman’s capsule, proximal convoluted tubule, Henle’s loop, distal convoluted tubule .