In Google Forms you can use the “Checkboxes” option to allow the responder to select multiple options. In a multiple choice question, responders can select exactly one option. Checkboxes may look like “Select all that… ” However, what if you need the user to select exactly “3” options, no more, no less?
3 Dots
The 3 dots, more options, menun

Response Validation
One of the options under the 3 dots menu is “Response validation.” Choose this to force the response to meet certain parameters.

Select Exactly
The default is “Select at least.” Change this to “Select exactly.” This will force the user to choose “3” options.

Set the Number
Type the number of how many checkboxes the responder should select. Suggestion to set the error text if they choose a different number than “3.”

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