Find the errors in the following code and rewrite the correct version:

char m="A";
Switch ("A");
{
 Case 'a';
     System.out.println("A");
     break;
 Case 'b';
     System.out.println("B");
     break;
 Default:
     System.out.println("Not a valid option");
}

The code has the following errors:

1. char variable m is assigned a String literal.
2. S in Switch is capital.
3. There should be no semicolon (;) after switch statement.
4. Expression of switch statement is a String literal "A".
5. C in Case is capital.
6. Semicolon (;) of case statements should be replaced with colon (:).
7. D in Default is capital.

Corrected Version:

char m = 'A';
switch (m) {
  case 'a':
    System.out.println("A");
    break;
  case 'b':
    System.out.println("B");
    break;
  default:
    System.out.println("Not a valid option");
}