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 cartilage, 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: Cartilage-hair hypoplasia syndrome

Cartilage-hair hypoplasia is an unusual form of short-limbed dwarfism with frequent and severe infections.
It is an autosomal recessive condition.

Feature of CHH

Short limb dwarfism.
Very fine thin light hairs and eyebrows.
Hyperextensible joints of hands and feet but an inability to extend.
Abnormalities of the spine.
Neutropenia
Defective antibody-mediated immunity.
Severe combined immunodeficiency and combined immunodeficiency.
Decreased number of T cells and defective T cell proliferation, cell-mediated immunity is also decreased.
Nothing is written about the function of T cell, only their number is decreased.