In an adult man weighing 70kgs, the extracellular fluid volume will be about: (A) 42L, (B) 25L, (C) 14L, (D) 12L
Answer is C. Body water varies from 45-75% of body weight. The intracellular component of body water accounts for about 40% of body weight and the extracellular component constitute 20% of body weight. Hence 20% of 70 equals to 14L approximately. (REF TEXTBOOK OF MEDICAL P G N 2 EDITION, PAGE NO 61)