Whilst driving, it is permitted to take one hand off the wheel for the following purpose only:
- Receiving a mobile phone call.
- Correct answer: Change gears.
- Reading or sending an SMS Message.
- Adjusting the passenger seat besides the driver.
Why this is the answer
The correct answer in the official bank: Change gears.
A driver must keep both hands on the wheel and may take one off only for an action needed to operate and control the vehicle, such as changing gears. Holding a mobile phone, reading or sending an SMS, or adjusting the passenger seat are not part of driving. They distract the driver and reduce control, so they are not allowed while driving.