1. Strictly speaking C supports 1-dimensional arrays only.
2. An array element may be an array by itself.
3. Array elements need not occupy contiguous memory locations.

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.

Assertion (A): Alkali metals are used as emitters in phototubes.

Reason (R): Alkali metals have low work functions.

1. The intersection of root locus branches with the imaginary axis can be determined by the use of Routh criterion
2. Segments of real axis having an odd number of real axis open loop poles plus zeros to their right are not parts of root locus
3. The number of root locus branches terminating on infinity is always zero