(1) Reuters - Incorrect. This is a British news agency.
(2) PTI - Correct. Press Trust of India is India's largest news agency.
(3) AFP - Incorrect. This is a French news agency (Agence France-Presse).
(4) AP - Incorrect. This is an American news agency (Associated Press).
Press Trust of India (PTI) is India's premier news agency, headquartered in New Delhi. It was established in 1947 and provides news coverage in both English and Hindi.