Match the following:
$A.$ Reflex action $1.$ Involuntary action
$B.$ Multipolar $2.$ Neuron
$C.$ $Na^+$ and $K^+$ ions $3.$ Parasympathetic nervous system
$D.$ Increases secretion of saliva and digestive juices $4.$ Reflex action
$E.$ Knee jerk $5.$ Active transport
The correct sequence for $A, B, C, D, E$ is:

• A
  $4, 2, 5, 3, 1$
• B
  $1, 4, 3, 5, 2$
• C
  $2, 4, 3, 5, 1$
• D
  $2, 3, 5, 1, 4$