(A): A salt bridge allows the flow of current by completing the electrical circuit (R) : A salt bridge maintains the electrical neutrality of the two half cells
A
a saturated solution of KCl and agar-agar
B
a saturated solution of `KNO_3` and agar-agar
C
a saturated solution of `NH_4NO_3` and agar-agar
D
all of these
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The correct Answer is:
D
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