The correct answer is A. Patna.
National Jute Manufacturers Corporation Ltd (NJMC) is a government-owned company headquartered in Patna, Bihar. It was established in 1971 with the objective of promoting the production and marketing of jute. NJMC has its own spinning mills, weaving mills, and processing units. It also undertakes research and development activities in the jute sector.
The other options are incorrect. Katihar is a city in the Indian state of Bihar. It is the headquarters of Katihar district. Kishanganj is a city in the Indian state of Bihar. It is the headquarters of Kishanganj district. Lakhisarai is a city in the Indian state of Bihar. It is the headquarters of Lakhisarai district.