'invalid_grant' error is thrown when:

‘invalid_grant’ error is thrown when:

‘invalid_grant’ error is thrown when:
A . The ‘code’, ‘refresh_token’, or ‘username’ and ‘password’ combination is invalid
B. The ‘redirect_uri’ doesn’t match the one used in the authentication request
C. The ‘redirect_uri’ doesn’t match the one used in the authorization request

Answer: A,C