The correct option is B 125 ml/min
Filteration of blood is the initial step of urine formation. This is done by a network of blood capillaries present at the beginning of nephron called glomerulus in the kidneys. The rate of blood flow filtered by all nephrons of both the kidneys per unit time is termed as glomerular filteration rate (GFR). Normal value of GFR in humans is 125 ml/min.