This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Facial Nerve stimulation during testing of nerve indicated by contraction of muscle? 
Select and explain. 
A. Temporalis, B. Masseter, C. Sternoleidomastoid, D. Orbicularis oris
D: Orbicularis oris
Answer: D: Orbicularis oris 
Explanation: Orbicularis oris. Orbicularis oris is a facial muscle All facial muscles are supplied by facial nerve Temporalis & Masseter are supplied by Mandibular nerve Sternocleidomastoid is supplied by spinal accessory nerve