Find equivalent capacitance between point A and B.

Explanation

Let Capacitance is `C_("eq")` then after line CD capacitance again will be equal to `C_(e_(q))` , because circuit is infinite. Then
`rArr C_(eq)=((C_(eq)+C)xxC)/(C+C+C_(eq)) rArr C_(eq)=(sqrt(5-1))/(2)C`