Which of the following festivals of Tamil Nadu is dedicated to Lord Muruga?

Thai poosam

The correct answer is Option (3) → Thai poosam

Out of the given options, the festival dedicated to Lord Muruga in Tamil Nadu is Thai Poosam.

• Thai Poosam is a vibrant festival celebrated by the Tamil Hindu community to honor Lord Muruga. It falls in the Tamil month of 'Thai' and coincides with the star 'Poosam' – combining the name of the month and the star.
• Pongal is a harvest festival dedicated to the Sun god Surya.
• Aadi Perukku is a monsoon festival celebrating the beginning of the monsoon season and thanking Indra, the rain god.
• Onam is a harvest festival celebrated in Kerala, another South Indian state.