A. Gain Water
B. Lose Water
C. Exchange gas
D. None of These
Submitted by: Rana usama Ibrahim
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
