With reference to Indian transport systems, consider the following statements:A. Indian railway system is the largest in the world.B. Among the States, Kerala has the highest density of surface roads.C. National Highways No. 7 is the longest in the country.Which of the above statements are correct?Select the code for the correct answer from the options given below:

With reference to Indian transport systems, consider the following sta

1.	With reference to Indian transport systems, consider the following statements:A. Indian railway system is the largest in the world.B. Among the States, Kerala has the highest density of surface roads.C. National Highways No. 7 is the longest in the country.Which of the above statements are correct?Select the code for the correct answer from the options given below:
A.	A and B only
B.	A and C only
C.	B and C only
D.	A, B and C
Answer» D. A, B and C