1. In 8085 address and data buses are multiplexed.
2. In Z 80 address and data buses are multiplexed
3. In Z 80 address and data buses are not multiplexed.
4. Z 80 has 16 bit address bus and 8 bit data bus.

1. If IF is too high, poor selectivity and poor adjacent channel rejection could result
2. If IF is high, tracking difficulties increase
3. A very low IF makes selectivity too sharp
4. As IF is decreased, image frequency rejection becomes better

Assertion (A): If source and destination addresses are made implicit the length of instruction is reduced.

Reason (R): 8085 has only 3 addressing modes.

Assertion (A): Rochelle salt and Barium titanate are both ferroelectric.

Reason (R): Ferroelectric materials exhibit hysteresis effect.