About ___________ per cent of the body weight of a human adult is contributed by muscles. They have special properties like __________________________________ .

Question

( A ) 40-50; excitability, contractility, extensibility and elasticity
( B ) 40-50; excitability and contractility
( C ) 20 -40; excitability and elasticity
( D ) 30-40; excitability, contractility and elasticity