What is the efficiency of Class-B amplifier?

What is the efficiency of Class-B amplifier? 

A) 68.50% B) 78.50% C) 88.50% D) 98.50%
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Answer :

What is the efficiency of Class-B amplifier? 

A) 68.50% B) 78.50% C) 88.50% D) 98.50%

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