Go through the following statements
During muscle contraction, the width of A-band remains constant while I-band shortens.
During muscle contraction, the `Ca^(2+)` released from the SR bind to the troponin component of thin filament
The process of muscle contraction is faster in smooth muscle as they have a well developed sarcoplasmic reticulum.
The red muscle fibres have abundant mitochondria, low glycogen and poorly formed sarcoplasmic reticulum.

Options

A. (i),(ii), and (iii)
B. (i),(ii) and (iv)
C. (i),(iii) and (iv)
D. All are correct

Answer

B