Which of the following statements is correct regarding immunodeficiency disorders?

Explanation: The correct answer is d. Abdominal pain and diarrhea. Abdominal pain and diarrhea are common clinical manifestations of immunodeficiency disorders. The weakened immune system makes the child more susceptible to gastrointestinal infections, leading to these symptoms.

Incorrect choices:

a. Rash and hives are more common clinical manifestations of allergic reactions or immune hypersensitivity disorders, not immunodeficiency disorders.

b. Rapid weight loss may be seen in conditions like malnutrition or metabolic disorders but is not a typical clinical manifestation of immunodeficiency disorders.

c. Excessive thirst and frequent urination are clinical manifestations of diabetes or other endocrine disorders, not immunodeficiency disorders.

Explanation: The correct answer is b. Genetic or inherited defects. Immunodeficiency disorders are primarily caused by genetic mutations or defects that result in a weakened or impaired immune system.

Incorrect choices:

a. While environmental factors can contribute to the development of secondary immunodeficiency disorders, they are not the primary cause of most immunodeficiency disorders.

c. Autoimmune reactions are not the primary cause of immunodeficiency disorders. Autoimmune disorders involve the immune system attacking the body's own tissues, not a deficiency in the immune system.

d. Excessive production of white blood cells is not the primary cause of immunodeficiency disorders. In fact, immunodeficiency disorders are characterized by a deficiency or impairment of white blood cells, which are essential components of the immune system.