• What can act as an evidence in favour of an innocent doctor?

Mr. A is a doctor by profession. Mrs B in order to defame Mr. A creates a situation, when she is in the doctors chamber she starts shouting and crying that the doctor misbehaved with her and files a complaint against the doctor for harrasment and assault. but the actual fact is that the doctor is innocent and did nothing which could constitute assault or harrassment. Advice Mr A { the doctor} regarding how he can shed off the burden of the 2 complaint and what all will be treated as a valid evidence in favour of him ?