The correct answer is b) Nehru Trophy Boat Race.
The Nehru Trophy Boat Race is a boat race held annually on the second Saturday of August in the Punnamada Lake in Kerala, India. It is the most famous boat race in Kerala and is considered to be the state’s water sport festival. The race is held over a distance of 16 kilometers and is participated by around 100 boats from different parts of Kerala. The race is named after Jawaharlal Nehru, the first Prime Minister of India.
The other options are:
a) Thrissur Pooram is a Hindu temple festival held annually in the city of Thrissur in Kerala, India. It is one of the most important festivals in Kerala and is considered to be one of the largest temple festivals in the world. The festival is held over a period of 10 days and is characterized by a number of rituals, processions, and cultural events.
c) Onam is a major Hindu festival celebrated in the Indian state of Kerala. It is a harvest festival and is celebrated to mark the homecoming of the mythical King Mahabali. The festival is celebrated over a period of 10 days and is characterized by a number of rituals, processions, and cultural events.
d) Attukal Pongala is a Hindu festival celebrated by women in the Attukal Temple in Thiruvananthapuram, Kerala, India. It is one of the largest religious gatherings in the world and is held annually on the 10th day of the Malayalam month of Makaram. The festival is characterized by a number of rituals, including the cooking of rice porridge on the banks of the Karamana River.