The correct answer is (c) Ganga Action Plan.
Explanation: GAP is commonly used to refer to the Ganga Action Plan, a project initiated in India to address water pollution in the Ganges river.
Why other options are incorrect:
(a) Governmental Agency for Pollution Control:
While the Ganga Action Plan is related to pollution control, the official abbreviation is specifically “GAP” for Ganga Action Plan.
(b) Gross Assimilation by Photosynthesis:
This is a scientific term related to the process of plants absorbing carbon dioxide during photosynthesis. It is not related to the acronym GAP.
(d) Governmental Agency for Animal Protection:
There are instances where “GAP” might refer to “Governmental Agency for Animal Protection”, but this is not the most common or widely recognized usage.