A $2H_{2} + O_{2} =2H_{2}O_{2}$
B $AgNO_{3} + NaCl = AgCl + NaNO_{3}$
C $2Na + 2HCl = 2NaCl + H_{2}$
D $NaOH + HCl = NaCl + H_{2}O$
Correct Answer: Option B
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