This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neck Triangles and parotid gland, Subject name: Anatomy
Different layers of deep cervical fascia is marked in the cross section. Which of the following statement is true? 
Select and explain. 
A. Axillary sheath is derived from B, B. Parotid sheath is derived from C, C. C represents Pretracheal fasica, D. C covers trapezius and sternocleidomastoid
C: C represents Pretracheal fasica
Answer: C: C represents Pretracheal fasica 
Explanation: A - PREVEEBRAL LAYER, B - INVESTING LAYER. C - PRETRACHEAL LAYER Axillary sheath develops from Preveebral layer (A) Carotid sheath is derived from contribution by all layers of deep cervical fascia. Parotid sheath is derived from investing layer. Thyroid sheath is derived from pretracheal layer. Investing layer covers trapezius and sternomastoid.