Consider the following statements
1. Safety valve in boilers will operate as soon as the pressure reaches the rated value
2. Two safety valves are provided for quick release of pressure
3. Blow down valve is operated regularly to remove sediments if any
4. Water level is monitored electrically in all large boilers
Of these statements
(a) 1 and 2 are correct (b) 2 and 3 are correct
(c) 3 and 4 are correct (d) 1 and 4 are correct