A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M. while machine P is closed at 11 A.M. and the remaining two machines complete work. Approximately at what time will the work (to print one lakh books) be finished?

1. A Option A: 11:30 A.M.
2. B Option B: 12 noon
3. C Option C: 12:30 P.M.
4. D Option D: 1:00 P.M.

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