The correct answer is C. New Delhi.
The Border Security Force (BSF) is a paramilitary force of India that is primarily tasked with guarding the country’s land borders. It is one of the largest paramilitary forces in the world, with a strength of over 2.5 lakh personnel. The BSF was raised on 1 December 1965, in the aftermath of the Indo-Pakistani War of 1965. The headquarters of the BSF is located in New Delhi.
The BSF is responsible for guarding India’s land borders with Pakistan, Bangladesh, China, Nepal, Bhutan, and Myanmar. It also conducts counter-insurgency operations in the northeastern states of India. The BSF has a long and proud history of service to the nation. It has played a key role in protecting India’s borders and in maintaining internal security. The BSF is a highly professional and well-trained force that is committed to the service of the nation.
The other options are incorrect.
Option A, Chennai, is the capital of the Indian state of Tamil Nadu. It is a major port city and a center of culture and education.
Option B, Kolkata, is the capital of the Indian state of West Bengal. It is a major industrial and commercial center.
Option D, Mumbai, is the capital of the Indian state of Maharashtra. It is the financial capital of India and a major center of commerce and industry.