With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements:

I. All types of UAVs can do vertical landing.

II. All types of UAVs can do automated hovering.

III. All types of UAVs can use battery only as a source of power supply.

How many of the statements given above are correct?

1. (a) Only one
2. (b) Only two
3. (c) All the three
4. (d) NoneCorrect answer

Answer: (d)