The correct option is C Social discrimination
In India, the Scheduled Castes, Scheduled Tribes, and certain Other Backward Castes have a history of being socially discriminated. Hence, they face a greater financial disadvantage due to the caste they belong to. So, they either own significantly less land or land which is not very fertile. When they are not able to grow enough crops or earn well, they become food insecure.
Landless farmers, regardless of taking part in food production, do not have access to foodgrains. In addition, agriculture is a seasonal activity, so Vinod is employed only during the seeding and harvest seasons, making him food insecure.