Explanation:

- The Minimum Support Price (MSP) is a form of market intervention by the Government of India to insure agricultural producers against any sharp fall in farm prices.

- It is announced for certain crops ahead of the sowing season.

- *Option 1: 72 crops* - This number is much higher than the actual number of MSP crops.

- *Option 2: 52 crops* - This is incorrect as the list of crops under MSP isn’t this extensive.

- Option 3: 22 crops - This is correct. The government of India declares MSPs for 22 mandated crops each season.

- *Option 4: 32 crops* - Another incorrect figure that exceeds the list.

- *Option 5: 42 crops* - Similar to other incorrect options, this number is too high.