Seven years from now, Arun will be as old as Bidan was 4 years ago. Charan was born 2 years ago. The average age of Arun, Bidan, and Charan after 10 years will be 33 years. What is the present age of Arun?

• A. 28 years
• B. 30 years
• C. 29 years
• D. 31 years