This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Do the embryological first pharyngeal arches remain? 
Select and explain. 
A. Sphenomandibular ligament, B. Stylohyoid ligament, C. Stylomandibular ligament, D. Styloid ligament
A: Sphenomandibular ligament
Answer: A: Sphenomandibular ligament 
Explanation: The pa of the cailage extending from the region of the middle ear to the mandible disappears, but it's sheath forms the anterior ligament of the malleus and the sphenomandibular ligament Ref: Human Embryology, Inderbir Singh, 10th edition, page no: 131