MCQ
$Z$ is


- ✓

- B

- C

- D







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$C{H_2} = CH - C \equiv C - C{H_2} - CN$
(image)
($1$) The compound $R$ is
(image)
($2$) The compound $T$ is
($A$) glycine
($B$) alanine
($C$) valine
($D$) serine
Given the answer question ($1$) and ($2$) 
Which of these structures is practically not a valid canonical structure for formaldehyde ?
$Ca{C_2}\xrightarrow{{{H_2}O}}A\mathop {\xrightarrow{{{\text{dil}}{\text{. }}{H_2}S{O_4}}}}\limits_{H{g^{ + + }}} B\mathop {\xrightarrow{{Ni}}}\limits_{{H_2}} C$