India’s first semi-high-speed train ‘Tejas’ will run between:

The answer is C) Mumbai and Karmali. The Tejas was billed as India's first semi-high-speed train, and the service the question refers to ran on the Konkan Railway route between Mumbai (CSMT) and Karmali in Goa. Its schedule was built around that corridor, which the question's time frame points to.

Why the others are wrong:

• A) Dadar and Kamthe: Kamthe is not a station on the main Tejas corridor. The option mixes up local suburban and Konkan-line points.
• B) Thane and Kolad: Thane and Kolad are on the Konkan line, but the Tejas was not run between these two stations.
• D) Mumbai and Pune: Pune is on a different corridor. Mumbai-Pune traffic runs on the Central Railway's Deccan Queen and Sinhagad lines, not the Tejas.

Core concept: a semi-high-speed train is a categorisation of rolling stock and track upgrades, not a separate class of train. For Mains, this links to railway modernisation, the Konkan Railway's history as a public-private corridor, and the debate on speed versus track capacity.

Note that the later Lucknow-New Delhi Tejas Express (2019), run by IRCTC, is a different service. Do not mix up the two if the question has been reworded.

Trap: Aspirants pick the Mumbai-Pune option because it is the most familiar corridor. The question tests the specific Konkan route, not general Mumbai connectivity.