Under which system are farmers forced to sell part of their produce to the Government at announced prices?

Correct option is D

Correct answer – (d)
Levy system mandates compulsory sale to Government.
Information Booster / Facts
Earlier used for cereals.
Why other options are incorrect
(a) Monopoly procurement is voluntary.
(b) Pre-emptive purchase is selective.
(c) Buffer stock is a storage mechanism.