General Medicine General d1c273a5 Mr. and Mrs. Annadurai have a 2 month old baby suffering from Down's syndrome. Karyotype of Mrs. Annadurai shows translocation variety of Down syndrome. Which of the following investigations will you advise to the parents before the next pregnancy? A Triple test B a-fetoprotein C Karyotyping D b-human chorionic gonadotropin (hCG)