Given below are two statements: one is labeled Assertion(A) and other is labeled Reason(R).

Assertion (A) : Sarcomere gets shorten during muscle contraction.
Reason (R) : ‘Z’ line attached to the actins are pushed outwards during contraction.

In light of the above statements, choose the correct answer from the options given below.

Assertion (A): "Sarcomere gets shortened during muscle contraction."

This statement is correct. The sarcomere, which is the basic contractile unit of a muscle, shortens during muscle contraction. This shortening occurs due to the sliding of actin and myosin filaments over each other.

Reason (R): "‘Z’ line attached to the actins are pushed outwards during contraction."

This statement is not accurate. During muscle contraction, the 'Z' lines (Z-discs) actually move closer together, not outwards. The sliding of actin and myosin filaments causes the sarcomere to contract, bringing the Z-discs closer.