Step 1: Historical fact.
The first railway line in India was opened in 1853, between Bombay and Thane, covering 34 km.
Step 2: Identify Governor-General.
This happened during the tenure of Lord Dalhousie (1848–1856), who is known as the “Father of Indian Railways.”
Step 3: Eliminate wrong options.
(B) Lord Lytton: Came later (1876–1880).
(C) Lord Cornwallis: Ruled much earlier (1790s).
(D) Lord Minto: Came later (1905–1910).
Step 4: Conclusion.
Correct answer is (A) Lord Dalhousie.