Which of the following has highest \( \mathrm{pH} \) ? (a) \( \frac{\mathrm{M}}{4} \mathrm{KOH} ...

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Which of the following has highest \( \mathrm{pH} \) ?
(a) \( \frac{\mathrm{M}}{4} \mathrm{KOH} \)
(b) \( \frac{\mathrm{M}}{4} \mathrm{NaOH} \)
(c) \( \frac{\mathrm{M}}{4} \mathrm{NH}_{4} \mathrm{OH} \)
(d) \( \frac{\mathrm{M}}{4} \mathrm{Ca}(\mathrm{OH})_{2} \)
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