I always make a hash of trying to describe the 12+ answer paper, but I'll have a go. Doubtless Patricia will mosey along and put me right as required!
For the 11+ the child has the 5 potential answers on the sheet, and they draw apencil line in the box next to the correct answer.
For the 12+ the answers are not shown on the answer sheet, merely the letter name of the answer, and there are no boxes for the pencil line. The answers appear as in the following examples:
1. [A] [B] [C] [D] [E]
2. [A] [B] [C] [X] [Y] [Z]
The child must draw a pencil line across the letter of the correct answer.
I thought you weren't going for the 12+?