Step 1: Concept Animal power is a major source of energy in traditional agriculture, measured in horsepower (hp).
Step 2: Meaning The power output of draft animals depends on their breed, size, weight, and health.
Step 3: Analysis On average, a single medium-sized bullock can develop about 0.5 hp. Consequently, a pair of such bullocks working together typically generates between 0.75 to 1.0 hp during sustained field work.
Step 4: Conclusion This places the power range for a pair of medium bullocks in the 0.5-1.0 hp bracket.
Final Answer: (A)