The following observation are recorded for steam condenser.Condenser vacuum = 680 mm (Hg)Barometer reading = 760 mm (Hg)Condenser temperature = 35°CP[email protected]° C = 42 mm HgWhat will be the vacuum efficiency?

• A. 82.4%
• B. 88.4%
• C. 94.7%
• D. 98.4%