Amount of drug left after four plasma half lives-: (A) 6.25%, (B) 12.50%, (C) 25%, (D) 50%
Answer is A. Ans. is 'a' i.e., 6.25% Half life Drug left After 1 t'" 50% After 2 t'" 25% After 3 til2 125% After 4 t"2 6.25% After 5 ty2 3.125%