I had reacently applied visitor visa form my mother through drop box at chennai. I had included I-134,verification letter,Pay stub, bank statement, invitation letter to mother, letter to consulate, affidavit letter form father and grandmother. Since my mother did not had any assets on her own, I just included my fathers assets and its value. Problem was, date of birth shown in her passport was wrong. As per passport, she is 38 years old now. Her visa application has been returned back and asked her to appear for interview. What do I need to do to get her visa ?.