Right option is (b) Sufentanil
The explanation is: Sufentanil, a potent analgesic, 5 to 10 times more potent than fentanyl for use in heart surgery. Alfentanil, ultra-short acting analgesic. Remifentanil, the shortest acting opioid, has the benefit of rapid offset, even after prolonged infusions. Carfentanil has analgesic potency 10,000 times that of morphine and is used in veterinary practice.