What's the point of asking questions similar in tone to, "Would you rape a baby to save your child's life?" What are you trying to get at -- just trying to figure out whether people would let their own innocent child die versus someone else's innocent child?
What would you do?
Pretty much in life if given a choice between another child vs their own, people invariably pick their own child. We do this daily. I make money to buy my children the necessities of life while letting some child in the world, somewhere out there, go without. Questions like this are simply more explicit about the decision.