Exp) Option b is the correct answer.

Option b is correct: In India, the irrigation device called araghatta or arahatta was one wheel with pitchers or pots of clay attached around the rim of the wheel. It was also called ‘Ghanti-Yantra’. Araghatta is a Persian wheel, a mechanical water-lifting device, used in medieval India to lift water from wells for irrigation.

• The essential part of the araghatta was the ghati-yantra or the device with pitchers, usually mounted on the wheel, but not attached to its rim. The ghati-yantra as an irrigation device is therefore often held as a pot garland.
• The araghatta seems to have drawn water from a reservoir which in turn received its water from an irrigation well. The spokes (arakas) of a wheel was a revolving apparatus though it does not refer to any gearing mechanism enabling the conversion of the horizontal rotary motion into a vertical rotary motion. The latter feature which became visible from the fourteenth century onwards, represented the typical Persian wheel or the saqia.

Source:

https://www.egyankosh.ac.in/bitstream/123456789/73310/1/Unit-11.pdf (Pg. 206)

https://egyankosh.ac.in/bitstream/123456789/73909/1/Unit-17.pdf (Pg. 288)