Everybody knows this. (Interrogative)
Does anybody know this?
Who does not know this?
Correct
Who do no know this?
Do anybody know this?
Explanation:
Correct Answer is: Who does not know this?
Assertive sentence এ everybody/ everyone/all ইত্যাদি subject হিসাবে বসলে Interrogative করার নিয়ম –
Everyone/everyone/all ইত্যাদির স্থলে Who বসে + donot/doesn`t/didn`t + verb এর base form + object.
সুতরাং, নিয়মানুযায়ী সঠিক উত্তর – Who does not know this?