If $(1, 3), (2, 5),$ and $(3, 3)$ are three elements of $A \times B$ and the total number of elements in $A \times B$ is $6$,then the remaining elements of $A \times B$ are:
- A$(1, 5), (2, 3), (3, 5)$
- B$(5, 1), (3, 2), (5, 3)$
- C$(1, 5), (2, 3), (5, 3)$
- DNone of these
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Match the following molecules in Column-$I$ with the number of lone pairs on their central atom in Column-$II$.
Column-$I$ (Molecules) Column-$II$ (Number of lone pairs on central atom) $A$. $NH_3$ $1$. Two $B$. $H_2O$ $2$. Three $C$. $XeF_2$ $3$. Zero $D$. $CH_4$ $4$. Four $5$. One
| Column-$I$ (Molecules) | Column-$II$ (Number of lone pairs on central atom) |
|---|---|
| $A$. $NH_3$ | $1$. Two |
| $B$. $H_2O$ | $2$. Three |
| $C$. $XeF_2$ | $3$. Zero |
| $D$. $CH_4$ | $4$. Four |
| $5$. One |
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