What do you understand by Zoning policy of government which led to the food shortage in Bihar and other states between 1965-1967?

Prohibition of trade of food across states

The correct answer is option (1) - Prohibition of trade of food across states

Bihar was prone to food crises in the early years of independence. There was a near-famine situation. The food shortage was very much acute in all districts of Bihar. Food shortage led to acute and widespread malnutrition. The zoning policies of the government prohibited the trade of food across states, which reduced the availability of food in Bihar.