The correct answer is: A) Thiruvananthapuram and Kollam.
The first railway line in Kerala was opened on 1 July 1861 between Thiruvananthapuram and Kollam. The line was built by the Travancore government and was operated by the Travancore State Railway. The line was extended to Quilon in 1862 and to Nagercoil in 1864.
The Beypore-Tirur line was opened in 1885. The Kochi-Alappuzha line was opened in 1891. The Shornur-Kozhikode line was opened in 1904.
The Thiruvananthapuram-Kollam line was a narrow-gauge line with a gauge of 2 ft 6 in (762 mm). The line was converted to broad-gauge in 1961.
The Thiruvananthapuram-Kollam line is a major railway line in Kerala. The line is part of the Southern Railway zone of the Indian Railways. The line is used by both passenger and freight trains. The line is important for the transportation of goods and people in Kerala.