A major non-conventional energy source being actively explored in Mizoram is:

Wind energy
Tidal energy
Solar energy
Biogas

The correct answer is: a) Wind energy.

Mizoram is a state in north-eastern India with a population of over 1.1 million people. The state has a high potential for wind energy, with an estimated installed capacity of 1,000 MW. The state government has been actively promoting wind energy development, and there are currently several wind farms in operation.

Wind energy is a clean and renewable source of energy that can help to reduce greenhouse gas emissions. It is also a cost-effective source of energy, and the cost of wind turbines has been declining in recent years.

Tidal energy is a form of hydropower that uses the rise and fall of tides to generate electricity. Tidal energy is a renewable source of energy, but it is not widely used due to the high cost of construction and maintenance of tidal power plants.

Solar energy is a form of renewable energy that uses the sun’s rays to generate electricity. Solar energy is a clean and efficient source of energy, but it is not always available due to the sun’s position in the sky.

Biogas is a renewable source of energy that is produced from the decomposition of organic matter. Biogas can be used to generate electricity, heat, and transportation fuel. Biogas is a clean and efficient source of energy, but it is not widely used due to the high cost of production.