Fill in the blank with correct option
The minister said, “Anyone using drones will have to register them on an ______ portal.”

Options

A. i) airport
B. ii) aviation
C. iii) airline
D. iv) aeroplane

Explanation

Airport is a place where aeroplanes land and take off.Airline is the industry of aeroplanes and Aeroplane is a mechanical device.
Drone is also a device which is related to the aviation sector. So, option (b) is the most appropriate answer.