The Union Ministry of Environment, Forests and Climate change, Government of India has announced 'Dolphin Day' which will be celebrated on

1. A

   April 15

   Option (a) claims Dolphin Day is celebrated on April 15, which is incorrect as no such national notification exists for this date in India.

2. B

   October 5

   Option (b) claims Dolphin Day is celebrated on October 5, which is the correct official date announced by the Ministry of Environment, Forests and Climate Change to generate awareness for the conservation of the Ganges River Dolphin, our national aquatic animal.

3. C

   July 15

   Option (c) claims Dolphin Day falls on July 15, which is factually wrong regarding the Ministry's notification and holds no significance for this specific observance.

4. D

   October 28

   Option (d) claims Dolphin Day is on October 28, which is incorrect because the Union Ministry specifically designated the fifth day of October for this annual event across the country.

Summary. Official key is (b) October 5. The Union Ministry of Environment, Forests and Climate Change announced this observance to focus on the protection and conservation of the endangered Ganges River Dolphin. Aspirants often confuse environmental commemorative dates, particularly mixing up wildlife-specific days with general global observance months. Option (b) correctly identifies the mandated date established by the central government. Therefore, all other alternative dates provided in the remaining options are factually incorrect.