Answer:
The correct answer will be Fiber → fibril → sarcomere → filaments.
Explanation:
Skeletal muscle is made up of long and cylindrical skeletal cell with a diameter up to 100 μm which are known as muscle fibres.
These muscle fibre encloses the smaller fibrils of 1.2 μm diameter which runs along the length of a muscle fiber.
Within each myofibril is enclosed the functional unit of muscle called sarcomere which is composed of contractile myofilaments- actin (thin filament) and myosin (thick filament).
Thus, Fiber → fibril → sarcomere → filaments are the correct answer.
