Here are the correct answers:

Against which team did DJ Campbell score his only league goal of last season?
Wolves

Which manager signed Campbell for Birmingham from Brentford?
Steve Bruce

How many clubs has Heidar Helguson played Premier League football for?
Four (Watford, Fulham, Bolton and QPR)

How many London clubs did Mark Falco play for during his career?
Four (Tottenham, Chelsea, QPR and Millwall)

Young forward Adam Francis, son of Gerry, recently signed a professional contract at QPR. Which of these non-League clubs has he spent time at?
Kingstonian