This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
A 64-year-old woman presents with fatigue, and musculoskeletal symptoms. She reports of no headache, jaw discomfort, or visual disturbance. Her physical examination is normal, and laboratory testing reveals an elevated ESR of 75 mm/h. She is started on prednisone 10 mg/day and notices a dramatic improvement in her symptoms after 1 week. Which of the following are the most typical symptoms of this disorder? 
Select and explain. 
A. heliotrope rash, B. proximal muscle weakness, C. painful peripheral neuropathies, D. stiffness and pain of proximal muscles
D: stiffness and pain of proximal muscles
Answer: D: stiffness and pain of proximal muscles 
Explanation: This patient has PMR. It is characterized by stiffness, aching, and pain in proximal muscle groups in the neck, shoulders, back, hips, and thighs. It is considerably more common than temporal arteritis. Both diseases are almost exclusively seen in the over 50 age group.