Which of the following statements is not true regarding a conductor?

Find the equivalent capacitance between point $A$ and $B.$

Find the capacitance between $A$ and $B.$

In the circuit shown, the charges on the capacitors $A$ and $B$ are respectively

An arrangement of three large metallic parallel plates with respective charges marked in figure is shown. What is the charge appearing on the left face of plate $B ?$

A parallel plate capacitor of area $A$ and plate separation $d$ is filled with two dielectrics as shown. What is the capacitance of the arrangement?

Consider a system of three charges $\frac{q}{3}, \frac{q}{3}$ and $-\frac{2q}{3}$ placed at points $A, B$ and $C$, respectively, as shown in the figure. Take $O$ to be the centre of the circle of radius $R$ and angle $CAB= {60}^{°}$.