Your Family Physician Taps Your Left Patellar Tendon with a Mallet

Your family physician taps your left patellar tendon with a mallet. What is the correct sequence of the events that occur?
I. Inhibition of motor neuron innervating flexors
II. Action potentials in 1a sensory neuron
III. Muscle spindle stretch receptor activated
IV. Action potentials in neuron innervating flexors
V. Action potentials in neuron innervating extensors

A) III → II → I and V simultaneously
B) II → III → IV
C) III → II → I → V
D) II → IV and V simultaneously → III