Which Equation Shown Is Correct for a Normal Distribution with a Median

Multiple Choice

Which equation shown is correct for a normal distribution with a median of 25 and a standard deviation of 5?

A) $f(x) =\frac{1}{\sqrt{10 \pi}} e^{\frac{-(x-25) ^{2}}{25}}$
B) $f(x) =\frac{1}{\sqrt{25 \pi}} e^{\frac{-(x-25) ^{2}}{25}}$
C) $f(x) =\frac{1}{\sqrt{50 \pi}} e^{\frac{-(x-25) ^{2}}{50}}$
D) $f(x) =\frac{1}{\sqrt{100 \pi}} e^{\frac{-(x-100) ^{2}}{50}}$