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radiobuttonresponse implements a true/false question with one correct answer. It uses the foil structure tags as described in , but the value of a foil can only be true, false, or unused. It is possible to use a Perl variable for the value attribute, as long as it can only have a valid value.

Several true foils can be specified, but only one (randomly chosen) will be displayed.

Possible attributes for radiobuttonresponse are:

• max: the maximum number of foils displayed at once (if more are specified, some will not be displayed)

• randomize: set to yes to randomize the order of foils when displayed

• direction: set to horizontal to display foils horizontally

Hints can be specified with radiobuttonhint.