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

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