According to National Building Code, the hydrants in water mains is provided at minimum interval of A. 50 m B. 60 m C. 75 m D. 90 m

According to the National Building Code, the hydrants in water mains are provided at a minimum interval of 60 meters. This is to ensure that there is always a hydrant available in the event of a fire. The hydrants are also spaced at regular intervals to make it easier for firefighters to access them.

Option A is incorrect because it is too short of an interval. Option B is incorrect because it is too long of an interval. Option C is incorrect because