Darbhanga district came into existence in 1875. It is one of the 38 districts of Bihar state, India. The district headquarters is Darbhanga city. The district is bounded by Samastipur district to the north, Madhubani district to the east, Saharsa district to the south, and Begusarai district to the west. The district has a population of over 4.5 million people. The main languages spoken in the district are Maithili, Bhojpuri, and Urdu. The main occupation of the people in the district is agriculture. The district is also home to a number of industries, including sugar mills, rice mills, and textile mills.
Option A: 1875 is the correct answer. Darbhanga district came into existence in 1875.
Option B: 1890 is incorrect. Darbhanga district came into existence in 1875, not 1890.
Option C: 1947 is incorrect. Darbhanga district came into existence in 1875, not 1947.
Option D: 1980 is incorrect. Darbhanga district came into existence in 1875, not 1980.