<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A syndrome caused by chromosomal anomalies is being researched in the immunology laboratory. Several congenital conditions are observed among the participating patients, mostly involving the thymus and the heart. Common facial features of affected individuals are shown in the image below. Flow cytometry analysis of patient samples reveals a CD19 and CD3- result. What kind of congenital anomaly is generally observed in these patients, specifically in the thymus?? A: Deformation, B: Agenesis, C: Aplasia, D: Malformation, E: Disruption,  <response>: This is a question about a congenital syndrome caused by chromosomal anomalies. The patients have facial features, thymus and heart abnormalities. Flow cytometry shows CD19 and CD3- cells, indicating lack of T cells. The key clues are:- Chromosomal anomalies- Thymus and heart abnormalities- Lack of T cells on flow cytometryThis points to DiGeorge syndrome, which is caused by a chromosomal deletion in chromosome 22q11. A major feature is thymic hypoplasia or aplasia leading to T cell deficiency. The choices refer to different types of abnormalities of the thymus. Based on the information provided, the thymus shows aplasia or absence, so choice C is likely the correct answer.C: Aplasia 