Which of the following statements regarding the types of muscles present in our body is correct?

Select the correct statements regarding the mechanism of muscle contraction.
$A.$ It is initiated by a signal sent by $\text{CNS}$ via a motor neuron,not a sensory neuron.
$B.$ Neurotransmitter generates an action potential in the sarcolemma.
$C.$ Increased $Ca^{++}$ level leads to the binding of calcium with troponin on actin filaments.
$D.$ Masking of the active site of actin prevents contraction; unmasking leads to contraction.
$E.$ Utilising the energy from $\text{ATP}$ hydrolysis to form a cross-bridge.

$I.$ Sarcoplasmic reticulum are abundant
$II.$ Myoglobin content is high
$III.$ Sarcoplasmic reticulum are moderate
$IV.$ Aerobic muscles
$V.$ Depends on anaerobic respiration for energy
$VI.$ Less myoglobin content
Select the option with correct statements for red muscle.

Which of the following is the contractile protein of a muscle?

Which ion is essential for muscle contraction?

Which mineral element is essential for muscle contraction?