Answer :
In a car with a manual transmission, when parking downhill, it is recommended to park with the transmission in **First gear (C)**. Here's why:
1. **Prevents rolling:** First gear provides the most resistance and is the lowest gear, making it harder for the car to roll downhill if the handbrake fails or if there's an issue with the parking brake.
2. **Engages engine braking:** When parked in first gear on a downhill slope, the engine helps slow down the car by working against the force of gravity, providing an extra layer of safety.
3. **Ease of starting:** Parking in first gear also makes it easier to start the car when you're ready to move again, especially on a slope, as the gear is already engaged, preventing the car from rolling backward.
Remember, always engage the handbrake or parking brake in addition to selecting the appropriate gear when parking on a hill for added safety.
