MP Police Constable 23-Jul-2016 Shift 2 Solved Paper

A farmer grows 3 crops in rotation – A, B, C. A is grown between the months Jan‐June, B between May – September, and C between August‐December. Each crop takes 3 months from sowing to harvesting. At a time only one crop can be grown.
If the farmer wants to harvest C in the month of December when is the latest he can sow A?