<prompt> Amniocentesis conducted during genetic counseling of a pregnant woman reveals a fetal adenosine deaminase deficiency. This autosomal recessive immunodeficiency is usually associated with which of the following?Humoral Immunity - Normal; Cellular Immunity - NormalHumoral Immunity - Normal; Cellular Immunity - DeficientHumoral Immunity - Deficient; Cellular Immunity - NormalHumoral Immunity - Deficient; Cellular Immunity - Deficient  <response>: Immunodeficiency disorders can be categorized according to whether the defect primarily involves humoral immunity bone marrow derived, or B lymphocytes or cellular immunity thymus derived, or T lymphocytes or both. Swiss-type hypogammaglobulinemia, ataxia-telangiectasia, the Wiskott-Aldrich syndrome, and severe combined immunodeficiency disorders all involve defective B-cell and T-cell function. Infantile X-linked agammaglobulinemia is caused chiefly by deficient B-cell activity, whereas thymic hypoplasia is mainly a T-cell immunodeficiency disorder.The fetus represented has severe combined immunodeficiency disease SCID characterized by defects in early stem cell differentiation. As a result, B cells and T cells are both defective, immunoglobulins are very low, and tonsils and lymph nodes are absent. 