The correct answer is: Only argument I is strong.
Argument I is strong because it provides a valid reason why India should make efforts to harness solar energy. The statement says that India should make efforts to harness solar energy to fulfill its energy requirements. Argument I supports this statement by providing evidence that most of the energy sources used at present are exhaustible. This means that India will eventually run out of these energy sources, and so it is important to find alternative sources of energy. Solar energy is a renewable energy source, which means that it will never run out. Therefore, it is a good option for India to consider as a source of energy.
Argument II is weak because it does not provide a valid reason why India should not make efforts to harness solar energy. The statement says that India should make efforts to harness solar energy to fulfill its energy requirements. Argument II contradicts this statement by providing evidence that harnessing solar energy requires a lot of capital. However, this does not mean that India should not make efforts to harness solar energy. It simply means that India will need to find a way to finance the project. There are many ways to finance a project, such as through government subsidies, private investment, or public-private partnerships. Therefore, Argument II does not provide a valid reason why India should not make efforts to harness solar energy.