A disc-like protein that is centrally found in sarcomeres is:

Explanation

M line is a line at center of sarcomere to which myosin bind.OPTION A: H-band is the zone of thick filament having no actin. OPTION B: Z-line is defined to be the lateral boundaries of a sarcomere. In muscles, Z-lines are found as a series of dark lines.OPTION C: M line is a line at center of sarcomere to which myosin bind.OPTION D: The I-band is region containing thin filaments.