Question
The two compounds shown below are

Answer

b
$(b)$ Given $2$ compounds are mirror images of each other and are not  superimposable on each other so are enantiomers.

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Arrange the following in increasing order of stability

$1.\,\,(CH_3)_2 - \mathop C\limits^ +   - CH_2 - CH_3$

$2.\,\,(CH_3)_3 - \mathop C\limits^ +  $

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$4.\,\,CH_3 - \mathop C\limits^ + H_2$

$5.\,\,\mathop C\limits^ +   H_3$

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