Which of the following statement(s) is/are correct?
A. In galvanic cell, salt bridge is not necessary for start of the cell reaction
B. A standard hydrogen electrode is assumed to have zero electrode potential at all temperatures
C. In electrolysis of diluted aqueous solution of NaCI, products at anode and cathode are `O_(2)` and `H_(2)` respectively
D. Inert electrolyte having comparable velocity of cation and anion is taken in salt bridg so as to maintain almost constant potential difference between two half cells
