How to tell apart Myopathy that is caused by Hyperthyroidism vs other causes like Glucocorticoids/CT disease (polymyositis/dermatomyositis)/cushings/LAmbert eaton/Myasthenia?
A) Serum creatine kinase (CK) levels
B) Electromyography (EMG)
C) Thyroid function tests
D) Muscle biopsy