| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| In the U.S. the blood type indicated by this letter is most common | O | $400 | J | MEDICINE | 1991-07-02 | #1592 | |
| People with this universal donor blood type are more likely to develop ulcers | O | $400 | DJ | SICKNESS & HEALTH | 1987-02-05 | #564 | |
| Blood group known as the "universal donor" | O | $200 | DJ | MEDICINE | 1985-01-25 | #100 |