The average revenues of 7 consecutive years of a company is Rs 71 lakhs. If the average of first 4 years is Rs 66 lakhs and that of last 4 years is Rs 78Â lakhs. What is the revenue for the fourth year.

• A. Rs 81 lakhs
• B. Rs 77 lakhs
• C. Rs 79 lakhs
• D. Rs 75 lakhs