When capacitors are connected in series, similar but opposite charges appear on every adjacent plate. How and why this happens ? Suppose charge appeared on plate A is $Q$ and then charge on plate F will be $-Q$ , as of now everything is ok but now they say charge on plate B will also be $-Q$ and so on. How can one confirm this?! The plates B and C are isolated, how such a symmetric condition is obtained. Please explain the core working.