The correct answer is D. 4.
A 6 HP motory trolly is a type of vehicle that is used to transport people and goods. It is a small, lightweight vehicle that is powered by a 6 horsepower engine. The trolly has a capacity of 4 passengers, including the driver.
The maximum number of passengers that can be carried on a 6 HP motory trolly is 4. This includes the driver. The trolly is not designed to carry more than 4 passengers, and doing so could be dangerous.
If you are planning to use a 6 HP motory trolly to transport people, it is important to make sure that you do not exceed the maximum passenger capacity. This will help to ensure the safety of all passengers.
The other options are incorrect because they do not represent the maximum number of passengers that can be carried on a 6 HP motory trolly. Option A is incorrect because it states that the maximum number of passengers is 10. This is not the case. Option B is incorrect because it states that the maximum number of passengers is 3. This is not the case. Option C is incorrect because it states that the maximum number of passengers is 9. This is not the case.