The relative reactivity of 1⁰H, 2⁰H and 3⁰H in chlorination reaction has been found to be 1:3.8:5 respectively .
$$\begin{gathered} {\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3\frac{{\mathrm{Cl}}_2}{\text{ light },{25}^0\mathrm{C}}{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{Cl}+.{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CHClCH}}_3 \\ \text{ 1-Chlorobutane 2-Chlorobutane } \end{gathered}$$
The percentage yield of (A) & (B) are expected to be