The Karthigai Deepam festival, known for the lighting of lamps, is spectacularly celebrated in:

Tiruvannamalai
Kanyakumari
Vellore
Rameswaram

The correct answer is: a) Tiruvannamalai.

Karthigai Deepam is a Hindu festival celebrated in the Tamil month of Karthikai (November–December). It is a major festival in the Tamil Nadu and Andhra Pradesh states of India, and is also celebrated in other parts of the world with Tamil diaspora. The festival is dedicated to the Hindu god Murugan, and is known for the lighting of lamps on the hilltop of Arunachala in Tiruvannamalai.

The festival is celebrated on the full moon day of the Tamil month of Karthikai. The date of the festival varies from year to year, but it usually falls in November or December. The festival begins with a procession of devotees from the town of Tiruvannamalai to the hilltop of Arunachala. The procession is led by a group of priests carrying a golden chariot, which is said to contain the image of Murugan.

Once the procession reaches the hilltop, the priests perform a puja (ritual) to Murugan. After the puja, the lamps are lit on the hilltop. The lighting of the lamps is a spectacular sight, and is said to represent the victory of good over evil.

The festival is a time for Hindus to pray to Murugan for his blessings. It is also a time for family and friends to come together and celebrate. The festival is a time of joy and happiness, and is a major tourist attraction in Tamil Nadu.

The other options are incorrect because:

  • Kanyakumari is a town in the Indian state of Tamil Nadu. It is located on the southernmost tip of India, and is a popular tourist destination. The town is known for its beaches, temples, and churches.
  • Vellore is a city in the Indian state of Tamil Nadu. It is located about 100 kilometers (62 miles) west of Chennai. The city is known for its fort, temples, and churches.
  • Rameswaram is an island town in the Indian state of Tamil Nadu. It is located about 120 kilometers (75 miles) off the coast of mainland India. The town is known for its temples, including the Ramanathaswamy Temple, which is one of the most sacred Hindu temples in India.