Correct option is (a) 0.15-0.25 ha/hr
To elaborate: Potato planter is used for planting of potatoes. The semi-automatic potato planter consists of a hopper, metering disc and furrow openers. It may plant in 2-4 rows. Its field capacity may be 0.15-0.25 ha/hr. It may be run by a 20-25 hp tractor.