This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
All are true about cailage, hair hypoplasia syndrome except - 
Select and explain. 
A. Neutropenia, B. Depigmentd hair, C. Non functioning T cells, D. None of the above
C: Non functioning T cells
Answer: C: Non functioning T cells 
Explanation: Ans. is 'c' i.e., Non functioning T cells Cailage hair hvpoplasia syndrome o Carilage hair hypoplasia is an unusual form of sho limbed dwarfism with frequent and severe infections. o It is an autosomal recessive condition. Feature of CHH Sho limb dwarfism. o Very fine thin light hairs and eyebrows. o Hyperextensible joints of hands and feet but an inability to extend. o Abnormalities of spine. o Neutropenia o Defective antibody mediated immunity. Severe combined immunodeficiency and combined immunodeficiency. o Decreased number of T cells and defective T cell proliferation, cell mediated immunity is also decreased. o Nothing is written about the function of T cell, only their number is decreased.