What must you remember as bus driver on duty?

Your answer is correct. As a bus driver on duty or on stand-by, you are not allowed to take any drugs or medications that can impair your ability to drive safely. Additionally, you must never begin driving if your ability is affected by such substances. This rule exists to ensure the safety of passengers and other road users. Even over-the-counter medications can sometimes affect your alertness or reaction time, so you must always be aware of potential side effects before driving. Only answer 1 and answer 2 are correct; it is not permitted to assume that non-prescription drugs are always safe for driving. Always check the information for any medication before you take it if you plan to drive.