Answer: c) Nehru Trophy

Explanation: The Nehru Trophy Boat Race is a popular annual event held in Alappuzha, Kerala, and is known for its spectacular snake-boat races.

Cheraman Juma Masjid, located in Kodungallur, is the oldest mosque in Kerala.

Malayalam is the official language of Kerala and is spoken by the majority of the population in the state.

Cochin International Airport is the only airport in Kerala with an international terminal.

Thrissur is known as the 'City of Sculptures' in Kerala.

Kottayam district in Kerala has the highest literacy rate.

Athirappilly Waterfalls, located in the Thrissur district, is the highest waterfall in Kerala.

Answer: b) Malayalam

Explanation: Malayalam is a Dravidian language spoken in the state of Kerala and is also one of the 22 official languages of India.

Kalaripayattu is a martial art form that originated in Kerala.

Deepika is the oldest Malayalam newspaper still in circulation.