This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parathyroid and adrenal glands, Subject name: Surgery
Which of the following is true about parathyroid? 
Select and explain. 
A. Upper parathyroid glands are superior to junction of inferior thyroid aery and RLN, B. Most common location of ectopic parathyroid glands is paraesophageal, C. Lower parathyroid is anterior to RLN, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: IDENTIFICATION OF PARATHYROIDS Approximately 85% of the parathyroid glands are found within 1 cm of the junction of the inferior thyroid aery and RLNs. Upper parathyroid glands Superior to junction of inferior thyroid aery and RLNs Dorsal (posterior)to RLN Lower parathyroid glands Inferior to junction of inferior thyroid aery and RLNs Ventral (anterior) to RLN The thin fascia overlying a "suspicious" fat lobule should be incised using a sharp curved hemostat and scalpel. This maneuver often causes the parathyroid gland to "pop" out. MC location of ectopic parathyroid gland: Paraesophageal > Mediastinal >Intrathymic