What is the size of the address bus in the 8085 microprocessor ?

The Intel 8085 microprocessor features a 16-bit address bus, which allows it to access up to 216 (65,536) unique memory locations. This capability enables the processor to address a total of 64 KB of memory space, which was standard for early microcomputers. The address bus width directly determines the maximum addressing capacity; therefore, an 8-bit bus (Option A) would only allow access to 256 bytes, which is insufficient for the 8085's design. Similarly, options C and D represent modern processor architectures with much larger memory addressing capabilities (4 GB and 16 EB respectively) that far exceed the specifications of the 8085. Consequently, Option B is the only correct choice as it accurately reflects the hardware architecture of this classic 8-bit microprocessor.