Ref. No. 1214 Alif
In the name of Allah the most Gracious the most Merciful
The answer to your question is as it follows:
The Zakat (obligatory charity) can be paid only to the poor Muslims. It cannot be given to non Muslims or Christians. If one did so it will not relieve him of the obligation. Nevertheless, if a non Muslim or a Christian is in a dire need, one should help him by giving Sadaqa (voluntary charity).
And Allah knows best
Darul Uloom Waqf Deoband