Consider the following statements about concrete sleepers.
1. They improve the track modulus.
2. They have good scrap value.
3. They render transportation easy.
4. They maintain the gauge quite satisfactorily.
Of these statements

A. Stop B. Proceed C. Proceed cautiously D. None of the above

A. 25 mm B. 40 mm C. 50 mm D. 10mm

A. 12 m and 12 m B. 12 m and 13 m C. 13 m and 12 m D. 13 m and 13 m

A. 2 B. 3 C. 4 D. none of the above