This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Which of the following is first pharyngeal arch muscle ? 
Select and explain. 
A. anterior belly of digastric, B. buccinator, C. platysma, D. posterior belly of digastric
A: anterior belly of digastric
Answer: A: anterior belly of digastric 
Explanation: I Arch-- Mandibular Meckel's cailage -Malleus, Incus ,Mandible,maxilla, zygomatic , palatine, temporal , antererior ligament of malleus, sphenomandibular ligament. II Arch--Hyoid Reiche's cailage - stapes , styloid process , lesser cornu of hyoid , upper half of body of hyoid . III Arch - Greater cornu of hyoid , lower half of body of hyoid. IV + VI Arches -thyroid, cricoid , corniculate , cuneiform, arytenoid , thyrohyoid ligament , Epiglottis. Ref : Inderbir Singh's Human Embryology, eleventh edition , pg. no., 129.