
- ✓$3-$ethyl$-4-4-$dimethylheptane
- B$1, 1-$diethyl$-2,2-$dimethylpentane
- C$4, 4-$dimethyl$-5 ,5-$diethylpentane
- D$5, 5-$diethyl$-4,4-$dimethylpentane.

According to the structure as referring to IMAGE $02$, first of all, long chain is selected, i.e., here it is of $7$ carbon.
So, it will be named as heptane and then third and fourth carbon contains one ethyl and $2$ methyl group.
So it will be named as $3$ - Ethyl -$4, 4$-dimethylheptane.
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$2 {X}+\mathrm{B}_2 \mathrm{H}_6 \rightarrow\left\lfloor\mathrm{BH}_2(\mathbf{X})_2\right\rfloor^{+}\left\lfloor\mathrm{BH}_4\right]^{-}$ the amine(s) ${X}$ is$(are)$
$(A)$ $\mathrm{NH}_3$ $(B)$ $\mathrm{CH}_3 \mathrm{NH}_2$ $(C)$ $\left(\mathrm{CH}_3\right)_2 \mathrm{NH}$ $(D)$ $\left(\mathrm{CH}_3\right)_3 \mathrm{~N}$
$(I)\,C{H_3}O\mathop C\limits^ \oplus {H_2}$ is more stable than $C{H_3}\mathop C\limits^ \oplus {H_2}$
$(II)\,M{e_2}\mathop C\limits^ \oplus H$ is more stable than $C{H_3}C{H_2}\mathop C\limits^ \oplus {H_2}$
$(III)\,C{H_2} = CH - \mathop C\limits^ \oplus {H_2}$ is more stable than $C{H_3}C{H_2}\mathop C\limits^ \oplus {H_2}$
$(IV)\,C{H_2} = \mathop C\limits^ \oplus H$ is more stable than $C{H_3}\mathop C\limits^ \oplus {H_2}$