In the figure shown below, the charge on the left plate of the $10\, \mu F$ capacitor is $-30\,\mu C.$ The charge on the right place of the $6\,\mu F$ capacitor is.....$\mu C$
A$ - \,12$
B$ + \,12$
C$ - \,18$
D$ + \,18$
JEE MAIN 2019, Diffcult
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D$ + \,18$
d $4V+6V=30$
$\Rightarrow V=3$
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