Find out equivalent capacitance between A and B

Explanation

Other method
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` C_( eq)=(Q)/(V) = (2xx A)/( V) `
` V= V_2 -V_4 =(V_2 -V_3) +(V_3-V_4) `
`" " = (xd)/( in _0) +(2xxd) /( in_0) =(3xx d)/( in_0) `
` therefore C_(eq)=(2Axx in _0 )/( 3xx d) =( 2Ain _0)/( 3d ) =(2C)/( 3) `