Sai,
By using the OOTB 'ForgottenPasswordHandler' LAH along with loading questions as a file from a properties resource bundle, you will be able to make use of the question mark (?) in security questions.
Example of 'passwordHints.properties' file content:
1=What was the name of your Elementary School?
2=What was the make of the first car you purchased?
Good luck!
Best,
Anthony P