Which statement is correct for muscle contraction?
(a) Length of H-zone decreases.
(b) Length of A-band remains constant.
(c) Length of I-band increases.
(d) Length of two Z-line increases.
(a) Length of H-zone decreases.
(b) Length of A-band remains constant.
(c) Length of I-band increases.
(d) Length of two Z-line increases.