The question asks what condition the Guardians and Wards Act, 1890 attaches to appointing a guardian for a married female minor. Testing each option against the husband's ordinary status as natural guardian narrows this down.
Since the husband is the presumed natural guardian, the only condition that logically fits displacing him is a judicial finding that he is unfit, not a formal incompetence declaration, his own consent, or a joint parental application.
Therefore, the correct answer is The husband must be considered unfit by the Court.