The correct answer is A. Instantaneous. The correct spelling is instantaneous.
Instantaneous means happening or taking place in an instant. It is an adjective.
The other options are spelled correctly.
- Intermediate means coming between two things in time, place, or order. It is an adjective.
- Intermittent means happening at intervals, with periods of non-activity in between. It is an adjective.
- Interference is the action of interfering with someone or something. It is a noun.
