how to reset security questions >

[FURRYe38]

You gave us nothing to go off.

There's a support site with access to manuals, firmware, install guides, etc.
Go to https://www.netgear.com/support/
Type in your model number and from there it'll take you to the above.
Its a great resource to start with.

[microchip8]

Security questions can only be reset by doing a full factory reset. This also means you'll have to configure your router from scratch.