The correct answer is A. Jammu Tawi.
Jammu Tawi is the northernmost railway station in India. It is located in the city of Jammu, in the Indian state of Jammu and Kashmir. The station was built in 1897 and is a major railway junction for trains to and from Srinagar, Leh, and other parts of Jammu and Kashmir.
Baramulla is a city in the Indian state of Jammu and Kashmir. It is located in the Baramulla district, which is the northernmost district in the state. The city is a major railway junction for trains to and from Srinagar, Leh, and other parts of Jammu and Kashmir. However, the railway station in Baramulla is not as far north as the railway station in Jammu Tawi.
Pathankot is a city in the Indian state of Punjab. It is located in the Pathankot district, which is the northernmost district in the state. The city is a major railway junction for trains to and from Amritsar, Jammu, and other parts of Punjab. However, the railway station in Pathankot is not as far north as the railway station in Jammu Tawi.
Guwahati is a city in the Indian state of Assam. It is located in the Kamrup Metropolitan district, which is the northernmost district in the state. The city is a major railway junction for trains to and from Kolkata, Dibrugarh, and other parts of Assam. However, the railway station in Guwahati is not as far north as the railway station in Jammu Tawi.