The correct answer is: B) Feudal landholding.
The Jenmi system was a form of feudal landholding in Kerala, India. Under this system, the Jenmi, or landlord, owned the land and the tenants, or ryots, were required to pay rent to the Jenmi. The Jenmi also had the right to collect taxes from the ryots. The Jenmi system was abolished in 1970.
Option A is incorrect because the Jenmi system was not a form of temple administration. Temples in Kerala were administered by a separate system of priests and trustees.
Option C is incorrect because the Jenmi system was not a form of trade monopoly. Trade in Kerala was carried out by a variety of merchants, including both Hindus and Muslims.
Option D is incorrect because the Jenmi system was not a form of caste hierarchy. The caste system in Kerala was a social system that divided people into different groups based on their birth. The Jenmi system was not based on the caste system.