The correct answer is Howrah.
Howrah Junction is the largest railway junction in India, with over 2,000 trains passing through it every day. It is located in the city of Howrah, in the Indian state of West Bengal. The junction was built in 1854, and it is one of the oldest railway junctions in India.
Howrah Junction is a major hub for both passenger and freight traffic. It is connected to all major cities in India, and it is also a major gateway for international travel. The junction is served by Howrah Station, which is one of the busiest railway stations in India.
The other options are incorrect for the following reasons:
- Delhi is the capital of India, and it is a major railway hub. However, it is not the largest railway junction in India.
- Bhatinda is a city in the Indian state of Punjab. It is a major railway junction, but it is not the largest railway junction in India.
- Mathura is a city in the Indian state of Uttar Pradesh. It is a major railway junction, but it is not the largest railway junction in India.
- Allahabad is a city in the Indian state of Uttar Pradesh. It is a major railway junction, but it is not the largest railway junction in India.