Consider the following statements concerning railways:1. A level stretch equal to the maximum train length is to be provided between the gradient reaches where a rising gradient is followed by a falling gradient.2. Vertical curves in railway tracks are not set out as parabolas.3. Diamond crossings can be laid on curves also.4. Curves should be avoided at the top level segment of bridges.Which of the above statements are correct?

Consider the following statements concerning railways:1. A level stret

1.	Consider the following statements concerning railways:1. A level stretch equal to the maximum train length is to be provided between the gradient reaches where a rising gradient is followed by a falling gradient.2. Vertical curves in railway tracks are not set out as parabolas.3. Diamond crossings can be laid on curves also.4. Curves should be avoided at the top level segment of bridges.Which of the above statements are correct?
A.	1 and 3 only
B.	2 and 3 only
C.	1 and 4 only
D.	2 and 4 only
Answer» B. 2 and 3 only

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