In Uttarakhand, which of the following districts has the lowest population ?

Haridwar
Bageshwar
Dehradun
Pithoragarh

The correct answer is (b), Bageshwar.

Bageshwar is a district in the Kumaon division of Uttarakhand, India. It is the northernmost district of the state and is bordered by Nepal to the north, Pithoragarh district to the east, Almora district to the south, and Chamoli district to the west. The district headquarters is the town of Bageshwar.

Bageshwar is a mountainous district with a population of 247,547 (2011 census). The majority of the population is Hindu, with a small Muslim minority. The main language spoken in the district is Kumaoni.

The economy of Bageshwar is based on agriculture, forestry, and tourism. The main crops grown in the district are rice, wheat, maize, and barley. The district is also home to a number of forests, which provide timber and other forest products. Tourism is a major source of income for the district, with visitors coming to see the mountains, temples, and other attractions.

Haridwar (a) is a city in the Haridwar district of Uttarakhand, India. It is located on the banks of the Ganges River, about 250 kilometers (160 mi) north of New Delhi. Haridwar is a major Hindu pilgrimage site, and is known for its temples, ghats (riverside steps), and festivals.

Dehradun (c) is the capital of the Indian state of Uttarakhand. It is located in the foothills of the Himalayas, at an elevation of 2,000 meters (6,600 ft). Dehradun is a popular tourist destination, and is known for its temples, parks, and museums.

Pithoragarh (d) is a city in the Pithoragarh district of Uttarakhand, India. It is located in the Kumaon region of the Himalayas, at an elevation of 2,200 meters (7,200 ft). Pithoragarh is a popular tourist destination, and is known for its temples, forts, and mountains.