[A] the onus of proving soundness of mind of a person always rests upon a person who alleges such state of mind of another person.
[B] the onus of proving unsoundness of mind of a person always rests upon a person who alleges such state of mind of another person.
[C] the onus of proving unsoundness of mind rests upon person of unsound mind.
[D] the onus of proving unsoundness of mind is on the judge deciding the case involving person of unsound mind.