Consider the following statements in the contact of high pressure boilers
1. The tendency of scale formation is eliminated due to high velocity of water through tubes
2. The heat transfer coefficient is increased by increasing the velocity of water through tubes
3. The steam can be raised quickly to meet the variable load
Which of the statements given above are correct?
(a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3