An emergency governor of a steam turbine trips the turbine when
1. Shaft exceeds 100% of its rated speed
2. Condenser becomes hot due to inadequate cooling water circulation
3. Lubrication system fails
4. Balancing of turbine is not proper Select the correct answer from the codes given below:
a. 1, 2 and 3 b. 2, 3 and 4
c. 3, 4 and 1 d. 4, 1 and 2