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
Limbs elevated against gravity but not against force is which power 
Select and explain. 
A. Grade I, B. Grade II, C. Grade III, D. Grade IV
C: Grade III
Answer: C: Grade III 
Explanation: 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)