The correct sequence of shifting binary number through a bidirectional shift register is:(a) All the lower registers are reset i.e. set = 0 by giving a pulse at the reset terminals.(b) The contents of the lower register are gated up directly to the upper register.(c) The upper register is reset for the next shift operation.(d) The contents of the upper register are gate down to the lower register either one positionto the right or to the left as desired.Code :

• A. (a), (c), (b), (d)
• B. (b), (a), (c), (d)
• C. (b), (a), (d), (c)
• D. (a), (c), (d), (b)