This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cellular Responses and Adaptations to Stress, Subject name: Pathology
[{'content': 'A patient who was previously with good muscle mass, now presents with decreased muscle mass. There is history of RTA which led him to be bedridden for 6 months. This decrease in muscle mass is best explained by: \nSelect and explain. \nA. Metaplasia, B. Dysplasia, C. Hypertrophy, D. Atrophy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) AtrophyRef: Robbings pathology 9th ed. /36* Prolonged disuse of muscle can cause atrophy of muscle leading to decreased muscle mass in this patient (atrophy of disuse).Other Causes of Atrophy can be* Loss of innervation (denervation atrophy)* Diminished blood supply (ischemic/senile atrophy)* Inadequate nutrition* Loss of endocrine stimulation* Pressure', 'role': 'assistant'}]