Choose the correct answer for the given question from the options.
19. For this question two statements are given - one labelled as Assertion (A) and other labelled as Reason (R). Select correct answer to this question from the codes as given below.
\(Assertion\ (A)\): Electrons in a conductor move toward the positive terminal, which is at a higher potential.
\(Reason\ (R)\): The function of a dry cell is to maintain a constant potential difference across the circuit.
\(Reason\ (R)\): The function of a dry cell is to maintain a constant potential difference across the circuit.