Automatic repeat request (ARQ) primarily combines error detection with?

  • ARetransmission requests
  • BAnalog frequency modulation
  • CSource entropy maximization
  • DCarrier suppression
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Correct Answer: A. Retransmission requests
Explanation: ARQ detects erroneous or missing blocks and requests retransmission rather than relying solely on forward correction.
Reference: Standard communication systems: ARQ