Hope this was unresolved for more than 2 days and I am afraid there is no one to solve this issue and I assume the question was not clear
The question is - What is UOM(unit of measure) used in x value '61' and y value '75', please clarify.....
Reference: [iBooks Author: Creating Review questions with XML: http://support.apple.com/kb/HT5427]
<choice target-x="61" target-y="75">Electron</choice>
Any help would be grate full