Correct Answer: Departure

Solution : The correct choice is the third option.

"Arrival" refers to the act of coming to a place or reaching a place.

"Departure" is the opposite of arrival, referring to the act of leaving or going away from a place.

The meanings of the other options are as follows:

• Timing : It is related to when something happens.
• Entrance : It means an opening, such as a door or passage, that allows access to a place.
• Appearance: It refers to the way that someone or something looks.

Therefore, "departure" is the correct antonym.