Consider the following activities:

I. Production of crude oil-free

II. Refining, storage and distribution of petroleum

III. Marketing and sale of petroleum products

IV. Production of natural gas

How many of the above activities are regulated by the Petroleum and Natural Gas Regulatory Board in our country?

Consider the following types of vehicles:

I. Full battery electric vehicles

II. Hydrogen fuel cell vehicles

III. Fuel cell-electric hybrid vehicles

How many of the above are considered as alternative powertrain vehicles?

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?

In the context of electric vehicle batteries, consider the following elements:

I. Cobalt

II. Graphite

III. Lithium

IV. Nickel

How many of the above usually make up battery cathodes?