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: Medicine
Increased serum calcium is seen in all except - 
Select and explain. 
A. Myxedema, B. Multiple myeloma, C. Primary hyperparathyroidism, D. Hyperthyroidism
A: Myxedema
Answer: A: Myxedema 
Explanation: None