Which of the following statements is correct?
- AAll amino acids except lysine are optically active.
- BAll amino acids except glutamic acid are optically active.
- CAll amino acids are optically active.
- DAll amino acids except glycine are optically active.
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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 |
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| $5$. One |
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