The correct answer is A. 45 meters.
LPG is a highly flammable gas, and if it leaks, it can create a fire hazard. The area around a leaking LPG tank should be evacuated to a safe distance of at least 45 meters. This will help to prevent the fire from spreading and causing injuries or damage.
Option B is incorrect because it is not a safe distance to evacuate to. Option C is incorrect because it is a much larger distance than is necessary. Option D is incorrect because it is an unreasonably large distance to evacuate to.
It is important to take precautions when dealing with LPG tanks. If you suspect that a tank is leaking, you should evacuate the area immediately and call the fire department.