Explanation:

- Option 1: Chinnaswami Subramanya Bharathi

- Also known as Bharathiyar, he was a renowned Tamil poet and freedom fighter.

- He contributed significantly to Tamil literature and the Indian independence movement.

- Option 2: TM Nair

- T.M. Nair was a prominent politician and medical practitioner from Tamil Nadu.

- He was associated with the Justice Party but not known for starting 'Kudi Arasu'.

- Option 3: Periyar EV Ramasamy

- Periyar EV Ramasamy is the correct answer.

- He founded the Tamil weekly magazine 'Kudi Arasu' in 1925.

- 'Kudi Arasu' focused on social reform and anti-caste activism.

- Option 4: C Natesa Mudaliar

- He was a founding member of the Justice Party.

- Not directly linked to 'Kudi Arasu'.