Answer: (iii) Intel 8051

Explanation: 8051 uses Harvard architecture (separate program and data memory spaces, with separate buses, PSEN for program, RD/WR for data, can access both simultaneously). Intel 8085 and 8086 are Von Neumann (or Von Neumann-like with unified memory) and ARM Cortex is typically Von Neumann / modified Harvard but question lists 8051 as the classic Harvard example among options. 8051 has distinct 64K program + 64K data spaces.**