This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Orthopaedics
[{'content': 'Limbs elevated against gravity but not against force is which power \nSelect and explain. \nA. Grade I, B. Grade II, C. Grade III, D. Grade IV', 'role': 'user'}, {'content': "Answer: C \nExplanation: Evaluation of strength of musclesThe strength of a muscle is graded from 0 to 5 follows:0, zero-no contraction1, trace-palpable contraction only2, poor-moves joint but not against gravity3, fair-moves joint against gravity4, good-moves joint against gravity and resistance5, Normal-normal strength(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition)", 'role': 'assistant'}]