Doordarshan Kendra, the only programme producing centre in Haryana is located at

The correct answer is option C. Ambala.

Doordarshan Kendra, the only programme producing centre in Haryana is located at Ambala. It was established in 1976. The centre has a transmission range of about 250 km and covers the entire state of Haryana and parts of Punjab, Himachal Pradesh, and Rajasthan. The centre produces a variety of programmes in Hindi and Punjabi, including news, current affairs, entertainment, and educational programmes.

The other options are incorrect. Option A, Faridabad, is a city in the state of Haryana. Option B, Gurugram, is a city in the state of Haryana. Option D, Hisar, is a city in the state of Haryana.