I have two radio button in my form (Radio 1, Radio 2)
When i am click on Radio 2 at that time one textbox is create in form.
I have used contact form 7
Thanks,
Yes, You can show textbox in your form on radio button checked by using Conditional Fields for Contact Form 7
plugin.
Please follow this link. It provides setting to hide or show particular field on select another field by using condition logic.
It should work for you as you needed.
Thanks.