15-25 gm
25-30 gm
70-90 gm
35-45 gm
The correct option is D (35-45 gm). Water is the most abundant chemical compound in living organisms. In a cell, water occupies 70-90% of the total mass. Therefore, in a 50 gm living tissue, the amount of water would be approximately 35-45 gm (70-90% of 50 gm).