Which type of immunodeficiency disorder is characterized by a lack of mature B cells and an inability to produce antibodies?

Explanation: The correct answer is c. Severe combined immunodeficiency (SCID). SCID is a group of rare genetic disorders that affect both T cells and B cells, resulting in a severe impairment of the immune system. Individuals with SCID are highly susceptible to infections and may need to live in a protected environment to avoid exposure to pathogens, hence the term "bubble boy disease."

Incorrect choices:

a. DiGeorge syndrome is a primary immunodeficiency disorder characterized by abnormalities in the development of certain organs, including the thymus, leading to impaired T cell function, but it does not affect B cell function.

b. X-linked agammaglobulinemia is a primary immunodeficiency disorder characterized by a lack of mature B cells and an inability to produce antibodies, but it does not affect T cell function.

d. Acquired immunodeficiency syndrome (AIDS) is a secondary immunodeficiency disorder caused by the human immunodeficiency virus (HIV) infection, which specifically targets and destroys CD4+ T cells, but it does not affect B cell function.

Explanation: The correct answer is c. Ensuring the client receives antiretroviral therapy (ART) as prescribed. ART is the mainstay of treatment for HIV infection and is essential for suppressing viral replication, improving immune function, and preventing disease progression.

Incorrect choices:

a. Encouraging strenuous physical activities is not recommended for clients with HIV infection, as it may place additional stress on the immune system and exacerbate symptoms.

b. While a balanced diet is essential for overall health, there is no specific evidence that a diet high in raw fruits and vegetables alone can boost the immune system sufficiently to manage HIV infection.

d. Clients with HIV infection should follow infection control precautions to prevent the transmission of the virus to others. Interacting freely with other clients may put them and others at risk of infection transmission.