The correct answer is option 'C' - both the Gulf of Kachchh and the Gulf of Khambhat are ideal places in India for utilizing tidal energy.

Tidal energy, also known as tidal power, is a form of renewable energy that harnesses the power of the tides to generate electricity. India has a long coastline and several regions with high tidal ranges, making it suitable for the development of tidal energy projects. The Gulf of Kachchh and the Gulf of Khambhat are two such regions that have the potential for harnessing tidal energy.

Gulf of Kachchh:
The Gulf of Kachchh is located on the western coast of India and is known for its high tidal range. It experiences significant tidal variations due to its proximity to the Arabian Sea. The tidal range in this region can reach up to 8 meters, which is ideal for tidal energy generation. The region also has a large tidal prism, which refers to the volume of water that can be stored and released during the ebb and flow of tides. This allows for the efficient extraction of tidal energy.

Gulf of Khambhat:
The Gulf of Khambhat, also known as the Gulf of Cambay, is located on the western coast of Gujarat. It is another region in India with a high tidal range, making it suitable for tidal energy projects. The tidal range in this region can reach up to 11 meters, which is one of the highest in the world. The Gulf of Khambhat experiences a semi-diurnal tidal cycle, with two high tides and two low tides occurring each day. This regular and predictable tidal pattern makes it easier to harness tidal energy.

Both A and B:
Both the Gulf of Kachchh and the Gulf of Khambhat offer favorable conditions for tidal energy generation due to their high tidal ranges and regular tidal patterns. The installation of tidal turbines or barrages in these regions can effectively capture the kinetic energy of the tides and convert it into electrical energy. These areas are also relatively close to the mainland, which makes it easier to transmit the generated electricity to the grid.

In conclusion, both the Gulf of Kachchh and the Gulf of Khambhat in India are ideal places for utilizing tidal energy due to their high tidal ranges and regular tidal patterns. Developing tidal energy projects in these regions can contribute to India's renewable energy goals and reduce dependence on fossil fuels.