In a two-stroke engine, how many times does the camshaft spin for each turn of the crankshaft?

Correct Answer: Option B — 1

In a two-stroke cycle engine, the power stroke occurs every revolution of the crankshaft. Consequently, the camshaft, which controls valve or port timing, must rotate at the same speed as the crankshaft to ensure proper timing for each cycle, resulting in a 1:1 ratio.