MCQ
Which is the correct structure of $D$ -glyceraldehyde ?
- A

- B

- C

- ✓All of these



Because glyceraldehyde has a chirality center, it can exist as a pair of enantiomers. 
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$(A)$ In $B _{2} H _{6}$, all $B - H$ bonds are equivalent.
$(B)$ In $B _{2} H _{6}$ there are four $3-$centre$-2-$electron bonds.
$(C)$ $B _{2} H _{6}$ is a Lewis acid.
$(D)$ $B _{2} H _{6}$ can be synthesized form both $BF _{3}$ and $NaBH _{4}$.
$(E)$ $B _{2} H _{6}$ is a planar molecule.
Choose the most appropriate answer from the options given below..... .
$CH_3-CH=CH-CH_2-C\equiv CH$