Fatal error: Uncaught PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'letter' in 'SELECT' in /home/u965202651/domains/mathsparsh.com/public_html/question.php:158 Stack trace: #0 /home/u965202651/domains/mathsparsh.com/public_html/question.php(158): PDO->prepare() #1 {main} thrown in /home/u965202651/domains/mathsparsh.com/public_html/question.php on line 158