Among emf , energy ,power and charge , which one has the unit A.s ?

Explanation

A.s = unit of current `xx` unit of time
By definition , the charge (Q) flowing through a conductor in unit time , is called current (I) .
`thereforeI=(Q)/(t)" or, "Q=It`
So ,a charge = current `xx` time
`therefore` A. s is the unit of charge .