Food grain storage and warehousing in Andhra Pradesh is managed by:

Food Corporation of India (FCI)
State Civil Supplies Corporation
Private warehouses
A combination of the above

The correct answer is: d) A combination of the above.

Food Corporation of India (FCI) is a statutory corporation of the Government of India under the Ministry of Consumer Affairs, Food and Public Distribution. It is responsible for procurement, storage, and distribution of food grains in India.

State Civil Supplies Corporation is a state government undertaking responsible for the procurement, storage, and distribution of food grains in Andhra Pradesh.

Private warehouses are owned and operated by private companies and individuals. They are used to store food grains, other commodities, and goods.

In Andhra Pradesh, food grain storage and warehousing is managed by a combination of FCI, State Civil Supplies Corporation, and private warehouses. FCI has a network of warehouses across the state, while State Civil Supplies Corporation has a smaller network of warehouses. Private warehouses are also available for storage of food grains.

The government of Andhra Pradesh has been encouraging private investment in food grain storage and warehousing. In 2017, the government announced a scheme to provide financial assistance to private companies for setting up warehouses. The scheme is expected to help in increasing the storage capacity of the state and improve the efficiency of food grain management.