Calculate the Number of Molecules in 0

Calculate the number of molecules in 0.25 mol of strychnine, C₂₁H₂₂N₂O₂.

A) 8.4 *10²⁴ molecules
B) 8.4* 10²³ molecules
C) 2.1 * 10²³ molecules
D) 1.5 * 10²³ molecules
E) 1.5 * 10²⁴ molecules