You are missing the 'East Riding of' in East Riding of Yorkshire. If you have 'North Yorkshire', 'South Yorkshire' and 'West Yorkshire' as answers, then 'Yorkshire' with no qualifier is not an answer in the set of counties you are looking for.
There's 48 counties of the type listed in this quiz, with the 45 here missing Bristol, Isle of Wight and City of London to make the full set.
There's 48 counties of the type listed in this quiz, with the 45 here missing Bristol, Isle of Wight and City of London to make the full set.
I'll go fix it now.