I am the principal applicant. It is not clear to me how my husband and my son (22 years old) should fill IMM 5406. 1. Should my husband mention his mother's and father's names in section A and his brother's name in section C? 2. Should my son mention his sister's name in section C and mother's (my) name and his father's name (my husband) in section A? Please, help me with this! Thanks in advance.