In transition boiling, heat flux decreases due to which of the following?1. Low value of film heat transfer coefficient at the surface during 100°C to 120°C surface temperature.2. Major portion of heater surface is covered by vapour film which has smaller thermal conductivity as compared to liquid.3. Nucleate boiling occurs very fast.Select the correct answer using the code given below.

• A. 1 only
• B. 2 only
• C. 3 only
• D. 1, 2 and 3