
- A$A-(III), (B)-(IV), (C)-(I), (D)-(II)$
- ✓$A-(IV), (B)-(II), (C)-(I), (D)-(III)$
- C$A-(IV), (B)-(II), (C)-(III), (D)-(I)$
- D$A-(III), (B)-(IV), (C)-(II), (D)-(I)$

$\mathrm{C}_6 \mathrm{H}_5 \mathrm{COC}_6 \mathrm{H}_5 \xrightarrow{\mathrm{Zn}(\mathrm{Hg}) \& \text { conc. } \mathrm{HCl}} \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{C}_6 \mathrm{H}_5$
$\mathrm{C}_0 \mathrm{H}_5 \mathrm{CHO} \xrightarrow[\mathrm{H}, \mathrm{O}]{\mathrm{CH}_3, \mathrm{Mgr}} \mathrm{C}_0 \mathrm{H}_5 \mathrm{CH}(\mathrm{OH}) \mathrm{CH}_5$
$\mathrm{CH}_3 \mathrm{COCH}_2 \mathrm{COOC}_2 \mathrm{H}_5 \xrightarrow{\text { Nath }, \mathrm{H}^{+}} \mathrm{CH}_3 \mathrm{CH}(\mathrm{OH}) \mathrm{CH}_2 \mathrm{COOC}_2 \mathrm{H}_5$
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Which one of the following options represents identical molecules?

$\mathrm{NH}_3, \mathrm{SO}_2, \mathrm{SiO}_2, \mathrm{BeCl}_2, \mathrm{CO}_2, \mathrm{H}_2 \mathrm{O}, \mathrm{CH}_4, \mathrm{BF}_3$