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Which of these is the correct group reagent for
\( \mathrm{P} \) group cations?

W
(1) \( \mathrm{Mn}^{2+}, \mathrm{Co}^{2+}, \mathrm{Zn}^{2+}, \mathrm{Ni}^{2+} \); dil \( \mathrm{HCl} \)
(2) \( \mathrm{Mn}^{2+}, \mathrm{Co}^{2+}, \mathrm{Zn}^{2+}, \mathrm{Ni}^{2+} ; \mathrm{NH}_{4} \mathrm{Cl}+\mathrm{NH}_{4} \mathrm{OH}+ \) \( \mathrm{H}_{2} \mathrm{~S} \)
(3) \( \mathrm{Mn}^{2+}, \mathrm{Co}^{2+}, \mathrm{Zn}^{2+}, \mathrm{Ni}^{2+} ; \mathrm{NH}_{4} \mathrm{Cl}+\mathrm{NH}_{4} \mathrm{OH} \)
(4) \( \mathrm{Mn}^{2+}, \mathrm{Co}^{2+}, \mathrm{Zn}^{2+}, \mathrm{Ni}^{2+} ; \mathrm{HCl}+\mathrm{H}_{2} \mathrm{~S} \)
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