1. The plasme membrane of muscle cell is known as sarcolemma.
2. Hydrostatic skeleton is stiff bony stucture present in fishes.
3. The vertebral ribs are not connected to sternum.

Options

A. 1 is correct, 2 and 3 are wrong
B. 1 and 2 is correct 3 is wrong
C. 3 is correct, 1 and 2 are wrong
D. 1 and 3 are correct, 2 is wrong

Answer

D