Neeraj and Manoj can do a piece of work in 10 days, Manoj and Suresh can do it in 15 days and Suresh and Neeraj can do it in 20 days. Suresh alone will complete the work in the following time -

• A. 60 दिन
• B. 120 दिन
• C. 80 दिन
• D. 30 दिन