If the cardinality of a set $A$ is 4 and that of a set $B$ is 3 , then what is the cardinality of the set $A \Delta B$ ?

• Correct answer
  A

  1
• B

  5
• C

  7
• D

  Cannot be determined as the sets $A$ and $B$ are not given

Hence, the correct answer is option: 'A'.