With reference to Indian transport systems, consider the following statements 1. Indian railway system is the largest in the world. 2. National Highways meet 45% of the total road transport requirement. 3. Kerala has the highest ground level road density among the states. 4. National Highway No. 7 is the longest highway in the country. Which of the above statement(s) is/are correct?

• A. 1 and 2
• B. 1 and 3
• C. 2 and 3
• D. 2 and 4