Arrange the given steps of muscle contraction in the series of events from first to last.
$I.$ Myosin head binds to the exposed active site on actin to form a cross bridge.
$II.$ The $Z$-line attached to these actin are also pulled inwards,thereby causing shortening of sarcomere,also called contraction.
$III.$ This pulls the attached actin filaments towards the centre of $A$-band.
The correct option is:

• A
  $I \rightarrow II \rightarrow III$
• B
  $III \rightarrow II \rightarrow I$
• C
  $I \rightarrow III \rightarrow II$
• D
  $III \rightarrow I \rightarrow II$