In striated muscle contraction:

Which muscle band remains unchanged during the contraction and relaxation of the skeletal muscle?

Humerus and muscles are connected with

Muscle contains a red-coloured oxygen-containing pigment called

The sheath covering the bundle of muscle fibres is

Given below are two statements:
$Statement-I$: Plasma creatinine is produced during catabolism of creatinine phosphate in skeletal muscle contraction.
$Statement-II$: Creatinine phosphate provides a ready source of high-energy phosphate.
In the light of the above two statements, choose the most appropriate answer from the options given below.