The correct answer is: B. Tajewala.
The Bhakra canal is a major irrigation canal in India. It is one of the largest canals in the world, and it irrigates over 1.5 million hectares of land in the states of Punjab, Haryana, and Rajasthan. The canal is also a major source of drinking water for millions of people.
The Bhakra canal enters Haryana from the Tajewala headworks, which is located on the Sutlej River. The headworks is a complex of dams, reservoirs, and canals that divert water from the Sutlej River into the Bhakra canal. The canal then flows through the states of Haryana and Rajasthan before it joins the Indira Gandhi Canal in Rajasthan.
The Bhakra canal is a vital part of the irrigation system in India. It provides water for agriculture, drinking water, and industrial use. The canal also helps to control floods and improve the environment.
The other options are incorrect because they are not places where the Bhakra canal enters Haryana. Barwala is a town in Haryana, but it is not located on the Bhakra canal. Tohana and Narwana are also towns in Haryana, but they are located on the Western Yamuna Canal, which is a different canal.