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.Al 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

   Only one. None of the three universal claims holds for every UAV type.

2. B

   Only two

   Only two. Vertical landing, hovering and battery-only each fail for some UAV class.

3. C

   All the three

   All three. Fixed-wing UAVs cannot land vertically or hover, and many long-endurance UAVs are not battery-only.

4. D

   None

   None. I fails (fixed-wing recovery). II fails (no hover without rotary/VTOL lift). III fails (fuel and hybrid UAVs exist). No statement is universally true.

Summary. Official Set A key is (d) none. ‘All types of UAVs’ is the trap. Fixed-wing drones need a strip, catapult or net; they cannot land vertically or hover. Rotary and some VTOL types can. Battery-only is true of small multirotors, not of HALE or many military airframes that burn liquid fuel. So I, II and III are all over-claims. The official count is zero correct statements.