Following solutions were prepared by mixing different volumes of $NaOH$ and $HCl$ of different concentration : <br> pH of which one of them will be equal to 1 ?

Question

( A ) 55 mL $\frac{M}{10}$ HCl + 45 mL $\frac{M}{10}$ NaOH
( B ) 60 mL $\frac{M}{10}$ HCl + 40 mL $\frac{M}{10}$ NaOH
( C ) 100 mL $\frac{M}{10}$ HCl + 100 mL $\frac{M}{10}$ NaOH
( D ) 75 mL $\frac{M}{5}$ HCl + 25 mL $\frac{M}{5}$ NaOH