You are called urgently to examine a term, 2-hour-old newborn who has had temperature instability, difficulty with feeding, and a sus- pected seizure. he has atypical facies (wide-set eyes, a prominent nose, and a small mandible), a cleft palate, and a holosystolic murmur. stat laboratory tests and chest radiograph reveal marked hypocalcemia, a boot-shaped heart, and no apparent thymus. which of the following is the most likely diagnosis?

a. ataxia–telangiectasia
b. digeorgesyndrome
c. hyper-ige syndrome
d. scid
e. wiskott-aldrich syndrome