For circuit the equivalent capacitance between points $\mathrm{P}$ and $\mathrm{Q}$ is if $\mathrm{C}_{1}=2 \mu \mathrm{F}, \mathrm{C}_{2}=3 \mu \mathrm{F}, \mathrm{C}_{3}=5 \mu \mathrm{F}, \mathrm{C}_{4}=10 \mu \mathrm{F}$.
(A) $6 \mu \mathrm{F}$
(B) $4 \mu \mathrm{F}$
(C) $(3 / 2) \mu \mathrm{F}$
(D) $5 \mu \mathrm{F}$