This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Myasthenia Gravis and Muscular dystrophy, Subject name: Medicine
What is the diagnosis of this patient? 
Select and explain. 
A. Myasthenia gravis, B. Congenital myopathy, C. Inclusion body myositis, D. Muscular dystrophy
D: Muscular dystrophy
Answer: D: Muscular dystrophy 
Explanation: The image shows pseudo-hyperophy of calf muscles seen in Duchenne's muscular dystrophy. Causes of pseudo-hyperophy of calf muscles 1. Dystrophinopathy like Becker's and Duchenne's 2. Limb-girdle muscular dystrophy 3. Spinal muscular atrophy 4. Glycogen storage disorders 5. Myxedema in Hypothyroidism 6. Sarcoidosis, Cysticercosis, and amyloidosis 7. Focal myositis 8. Ruptured muscle tendon 9. A muscle tumor or a muscle hernia