Hello Jaydip
Did you find this question in The PM Exam Simulator? In the Simulator, you can see the explanation for the answer.
Having looked into the debate online around this question, the confusion comes from whether the PM is included in the calculation or not. As the question says, "You have identified 10 stakeholders with whom you need to communicate," I interpret this to mean you should add in the PM to the calculation on top of the original 10 stakeholders.