નીચેનામાંથી કયા દ્રાવણનો $pH$ $1.0$ ની નજીક હશે?

• A
  $100 \ mL$ $\frac{M}{10} \ HCl + 100 \ mL$ $\frac{M}{10} \ NaOH$
• B
  $55 \ mL$ $\frac{M}{10} \ HCl + 45 \ mL$ $\frac{M}{10} \ NaOH$
• C
  $10 \ mL$ $\frac{M}{10} \ HCl + 90 \ mL$ $\frac{M}{10} \ NaOH$
• D
  $75 \ mL$ $\frac{M}{5} \ HCl + 25 \ mL$ $\frac{M}{5} \ NaOH$