This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Primary Immunodeficiency, Subject name: Pediatrics
What is the probable genetic defect in this child with recurrent infections, tetany, oral candidiasis & a hea murmur? 
Select and explain. 
A. 21q deletion, B. 21p deletion, C. 22q deletion, D. 22p deletion
C: 22q deletion
Answer: C: 22q deletion 
Explanation: Digeorge syndrome: Caused by 22q deletion C- Cardiac anomaly A- Abnormal facies (hypeelorism, antimongoloid slant, sho philtrum, mandibular hypoplasia. T- Thymic hypoplasia C- Cleft palate H- Hypocalcemia