The correct answer is A. Katihar.
Katihar is a district in the Indian state of Bihar. It is located in the north-eastern part of the state, and is bordered by the districts of Purnia to the north, Araria to the east, Kishanganj to the south, and Bhagalpur to the west. The district has a population of over 4 million people, and its headquarters is the town of Katihar.
Katihar is a major tea-producing district in India. The tea industry is the largest employer in the district, and accounts for a significant share of the district’s economy. The tea industry is concentrated in the northern part of the district, in the areas around the towns of Katihar, Barsoi, and Sonamura.
The tea industry in Katihar is a major contributor to the state’s economy. The industry provides employment to over 100,000 people, and generates over â¹1,000 crore in revenue each year. The tea industry is also a major source of foreign exchange for the state.
The tea industry in Katihar is facing a number of challenges, including declining productivity, rising costs, and competition from other tea-producing countries. However, the industry is still a major contributor to the state’s economy, and is expected to continue to grow in the future.
The other options are incorrect because they are not major tea-producing districts in India.