Q. Consider the following statements:Automatic signalling system results in 1. Greater risk 2. Higher efficiency 3. Avoidance of block instruments 4. Higher operating cost Of these statements (Solved)
1. 1 and 2 are correct
2. 3 and 4 are correct
3. 1 and 4 are correct
4. 2 and 3 are correct
- d. 2 and 3 are correct