Read the given statements and select the correct option regarding the subject of discussion.Sanjay: Railways involve high construction and maintenance cost.Kunal: A few states of India lack a good railway network.Amit: The construction of railways is very difficult and costly in flat land whereas it can easily be done in mountainous region.Rajeev: Areas with less industrial development cannot compensate the cost of construction of railways, hence have less railway network.

• A. Only Sanjay and Amit are correct.
• B. Amit and Rajeev gave the reasons of Kunal's statement.
• C. Sanjay and Rajeev gave the reasons of Kunal's statement.
• D. Amit gave the explanation of Sanjay's statement.