Machine Cycles And Clock Cycles

Step 1: Understand the terms.
- **Machine Cycle:** The time required to complete one operation of accessing memory, I/O, or acknowledging an external request by the microprocessor. This is the basic unit of time used in a microprocessor for such operations.

- **Instruction Cycle:** Refers to the cycle in which a machine instruction is fetched, decoded, and executed.

- **T-state:** Refers to a single clock cycle of the microprocessor.

- **Clock Period:** Refers to the time between two consecutive clock pulses.

Step 2: Conclusion.
The correct answer is (1) One Machine Cycle, as it matches the definition provided in the question.