What is the oxidation number for each atom in NH4Cl?

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What is the oxidation number for each atom in NH₄Cl?
A. N=+3, H=-4,Cl=+1
B. N=+3, H=+1,Cl=-1
C. N=-3, H=-1,Cl=+1
D. N=-3, H=+1,Cl=-1