Which of the following statements about c4 carbon fixation is not true?

There aren't statements therefore you can not make a correct assumption.The question is actually incomplete so we were not able to answer it properly due to the lack of information you have given us. But it is guaranteed that once you ask us about certain thing and give u the needed information to answer the question, we will be glad to do it. Thank you for this question, please provide the needed information next time.