The correct option is B 125 ml/min
GFR (glomerular filtration rate) is the amount of filtrate formed per minute by the glomerulus of the nephrons in the kidneys. In a healthy person, the GFR is about 125 ml/min which makes 180 liters per day. Of the 180 liters of filtrate formed per day, only 1.5 liters is passed through the urethra as urine, rest of it is reabsorbed by the tubules of nephron.