You mentioned there's 4 (A.) F1 WC ... but somehow I came across 5 as you will notice.
Although I responded with 90s/100s years of F1 drivers and with no answers to 50s/60s years of F1 drivers...
- 1. John Surtees - A. B. (still alive)
2. Phil Hill - A. D.
3. Jack Brabham - A. C. F.
4. Sorry no idea ... who this guy is.
5. Graham Hill - A. C. D. E.
6. Jim Clark - A. D.
7. Stirling Moss - (still alive)
8. Bruce McLaren - F.
- A. Four F1 World Champions with a total of six F1 World Championships between them
B. One four-time 500cc motorcycle World Champion and F1 World Champion
C. Two two-time F1 World Champions
D. Two Indy 500 winners
E. The only person to ever have won motor racing's triple crown - F1 World Champion, Indy 500 and Le Mans
F. Two who raced F1 cars that they built
Luke