The clue to need help by age of 24 months, if the child

Correct Answer: D

Rationale: By 24 months, children should begin using short sentences.

Correct Answer: A

Rationale: Nutramigen is a hypoallergenic formula specifically designed for infants with cow's milk allergy (CMA). It is extensively hydrolyzed, which means the cow's milk proteins are broken down into smaller pieces, making it easier for babies with CMA to digest without triggering an allergic reaction. Other options such as goat's milk, Similac, and Enfamil are not suitable substitutes for an infant with CMA as they may still contain proteins that can cause an allergic response in these infants. Therefore, Nutramigen is the most appropriate recommendation for a 6-month-old infant diagnosed with cow's milk allergy.

Correct Answer: B

Rationale: CD4+ T cells are a type of white blood cell that plays an essential role in coordinating the immune system's response to infections. In individuals with HIV infection, the virus specifically targets and destroys CD4+ T cells. Therefore, measuring CD4+ levels provides valuable information about the extent of damage to the immune system caused by HIV. Monitoring CD4+ levels helps in assessing the progression of the disease and determining when to initiate antiretroviral therapy to prevent opportunistic infections. Additionally, CD4+ levels are used to determine the prognosis and guide treatment decisions in individuals with HIV.

Correct Answer: C

Rationale: Systematic lupus erythematosus (SLE) is an autoimmune disease that primarily attacks various tissues and organs in the body, including the skin, joints, kidneys, and nervous system. In particular, SLE can affect the peripheral nervous system, leading to symptoms such as neuropathy, mononeuritis multiplex, and other neurological manifestations. Therefore, among the given options, the nerve is the tissue primarily targeted by SLE.

Correct Answer: D

Rationale: Hypothermia is not traditionally considered a teratogen compared to others listed.