A source produces 4 symbols with probabilities , , , For this source, a practical coding scheme has an average codeword length of 2 bits/symbol. The efficiency of the code is

• A. 1
• B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-789-61-4.png">
• C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-789-61-1.png">
• D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-789-61-2.png">