Which of the following coasts is the largest tidal energy producing area in India?

1. A

   North Circars Coast

   North Circars Coast claims a major role in eastern peninsular tidal initiatives. However, it lacks the massive tidal range found in the western estuaries.

2. B

   Mannar Coast

   Mannar Coast claims high potential due to narrow straits between India and Sri Lanka. Yet, tidal energy generation here remains secondary to the western gulfs.

3. C

   Khambhat Coast

   Khambhat Coast claims the largest tidal energy producing area in India, driven by the exceptionally high tidal range in the Gulf of Khambhat. This vast estuarine indentation provides ideal geographical conditions for harnessing maximum kinetic tidal power, making it the official key.

4. D

   Kerala Coast

   Kerala Coast claims significant marine energy prospects along the southwestern strip. However, its wave regime differs from the specific tidal resonance recorded in the northern Arabian Sea gulfs.

Summary. Official key is (c) because the Gulf of Khambhat possesses the highest tidal range along the Indian coastline. The configuration of the western coast funnels oceanic tides to generate massive energy yields. Other regional coasts lack comparable topographical resonance. Thus, Khambhat stands out as India's premier tidal energy producing area.