What is the square root of the atomic number for manganese

For this case, we have that by definition:

Manganese is a chemical element that has an atomic number equal to 25. This element is located in group 7 of the periodic table of the elements. The symbol for this element in the periodic table is: Mn.

Therefore, taking the square root we have:

the square root of the atomic number for manganese is 5.

the answer is either b or c