According to the book, which information do you give the 112 operator at a serious accident? (multiple answers possible)
How many (seriously) injured there are
Your driving licence number, that is required for every 112 call
Only that 'something happened', the emergency service will fill in the rest later
As exactly as possible where you are
What happened and how many vehicles are involved
Explanation
False — trap: report kept too vague. The more precise your report (location, situation, number injured), the faster the right help arrives (Book p.170).