Asking about Viewcontroller presenter

I have a ViewController A that need to present in Viewcontroller B. But before the VC A is presented, user pushed to Viewcontroller C and the VC A still show on C. How can it possible? In my point of view, I think the VC B will not show because the VC A is hided. Anyone can help me with this?. Many thanks

Asking about Viewcontroller presenter
 
 
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