Final answer:
Thrombocytopenia, Eczema, and recurrent infections are related to a deficiency in B and T cells.
Step-by-step explanation:
The subject of the question is Biology.
Thrombocytopenia refers to a condition where there is a decrease in the number of platelets in the blood.
Platelets are important for blood clotting, so thrombocytopenia can lead to abnormal bleeding.
Eczema is a skin condition characterized by inflammation and itching.
Recurrent infections can be caused by a deficiency in B and T cells, which are important for the immune response.