The correct answer is D. Maximum 10% less of MPS.
The speedometer is a device that measures the speed of a vehicle. It is usually located on the dashboard of the vehicle and is visible to the driver. The speedometer is important for ensuring that the vehicle is not driven at an unsafe speed.
If the speedometer is defective, it is important to drive the vehicle at a safe speed. One way to do this is to drive at a speed that is 10% less than the maximum speed that the vehicle is capable of. This will help to ensure that the vehicle is not driven at an unsafe speed.
Option A is incorrect because 50 kmph is not a safe speed to drive at if the speedometer is defective. Option B is incorrect because 40 kmph is not a safe speed to drive at if the speedometer is defective. Option C is incorrect because 25 kmph is not a safe speed to drive at if the speedometer is defective.