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| सूची-$I$ (आयन) | सूची-$II$ (धनायन विश्लेषण में समूह संख्या) |
| $A. Co^{2+}$ | $I. Group-I$ |
| $B. Mg^{2+}$ | $II. Group-III$ |
| $C. Pb^{2+}$ | $III. Group-IV$ |
| $D. Al^{3+}$ | $IV. Group-VI$ |
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