Whether nullity is possible on the grounds of husband impotency

My case is running in trial court under sec 12 1(a) husband impotency. Court done his potency test from Aiims Delhi. Doctors wrote his medical report is that he has no erectile dysfunction.There is nothing to suggest that the person is incapable to perform sexual intercourse in normal circumstances.However psychological causes leading to nonperformance as happens in QUOAD HONC cannot be ruled out.My question is on the basis of above medical report nullity is possible? Please guide me and give me suitable answer.