Which of the following is not a form of oral communications ?

 d) None of the above..................................

All these are types of oral communication.

》》》》》》》》》》》》d)None of the above.            

d) None of the above is the right answer

D is an accurate answer not an oral communication...

Thanks 

I support answers of my colleagues 

My answer is an option (D)

>>>>>>>>>>>>>>>>>>>>  d) None of the above