4. Pablo, Sophia, and Mia each received some candies at a party. Pablo's number of candies is 3 times that of Sophia, and Sophia's number of candies is 2 times that of Mia. Pablo decides to give some of his candies to Sophia and Mia, so that the three of them have the same number of candies. What fraction of his original number of candies does Pablo give to Sophia?
(A) $\frac{1}{12}$
(B) $\frac{1}{6}$
(C) $\frac{1}{4}$
(D) $\frac{1}{3}$
(E) $\frac{1}{2}$
4. B.

Let the number of candies Mia has be $m$. Thus, Sophia's number of candies is $2 \mathrm{~m}$, and Pablo's number of candies is $6 \mathrm{~m}$.

If the three of them have the same number of candies, each person should have $\frac{m+2 m+6 m}{3}=3 m$ candies.

Therefore, Pablo needs to give Sophia $m$ candies and give Mia $2 m$ candies.

Thus, the number of candies Pablo gives to Sophia is $\frac{m}{6 m}=\frac{1}{6}$ of his original number of candies.