F1 quiz: Separate the genuine drivers from the imposters

More than 750 drivers have raced in the Formula 1 World Championship since the first race in 1950 - that's an awful lot of people.

Most of you will know your Ayrton Sennas from your Michael Schumachers, your Lewis Hamiltons from your Niki Laudas, but what of the more obscure members of that elite, 754-strong club?

Can you identify the genuine F1 drivers from the imposters?