Assertion : On stimulation, a muscle cell releases calcium ions (Car2+) from sarcoplasmic reticulum.
Reason :By reacting with a protein complex, Cart uncover active sites on the actin filaments.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not correct explanation of A
(c) A is true but R is false
(d) A and R are false
