MCQ
Racemic mixture is obtained due to halogenation of :
- A$n-$ pentane
- BIsopentane
- Cneopentane
- ✓Both $A\,\& \,B$
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(Mass of proton $= 1.67 \times 10^{-27}\, kg$ and $h = 6.63 \times 10^{-34}\, Js$)

$3 s^{2}$; $3 s^{2} 3 p^{1}$; $3 s ^{2} 3 p ^{3}$; $3 s^{2} 3 p^{4}$
The correct order of first ionization enthalpy for them is.