Insensible water loss per day is ‑
Ans. C. 700 ml
Insensible water loss- There is a continuous loss of water by evaporation from the respiratory tract and diffusion through the skin, which together accounts for 700 ml/day of water loss under normal conditions.
The insensible water loss from skin (diffusion through the skin) occurs independently of sweating and accounts for 350 ml of water loss per day.
So, in the absence of sweating, water loss from the skin is 350 ml/day