When two trollies are working in section the gap between the two must be A. 100 meters B. 200 meters C. 400 Meters D. None of these

The correct answer is B. 200 meters.

The minimum safe distance between two trollies working in the same section is 200 meters. This is to ensure that there is enough space for the trollies to pass each other safely. If the trollies are too close together, there is a risk of a collision.

Option A is incorrect because it is not a safe distance between two trollies working in the same section. Option C is incorrect because it is a much larger distance than is necessary. Option D is incorrect because it is not an option.