Quiz Factory

Question

Please allow radio button one answer type questions.

Answer 1

bcz it allows me to create objective questions.

Answer 2

You can do this via multiple choice question.
Select that option, post the question and answer. In the answer select the correct option in you case it will be only one (because you're expecting the radio opion). Then preview your question(answers will be displayed in a radio button because only one is correct in it) and submit your question.
Hope it will be useful to you and post as many questions