12. It is well settled by a catena of decisions of the Supreme Court that corroboration is not a sine qua non for conviction in a rape case. If the evidence of the victim does not suffer from any basic infirmity and the 'probabilities factor' does not render it unworthy of credence. As a general rule, there is no reason to insist on corroboration except from medical evidence. However, having regard to the circumstances of the case, medical evidence may not be available. In such cases, solitary testimony of the prosecutrix would be sufficient to base the conviction, if it inspires the confidence of the court.