Which of the following tests is associated with lead poisoning?

The Blood Lead Level Test is directly associated with lead poisoning as it specifically measures the concentration of lead in a person's blood. Elevated levels of lead can indicate poisoning, which can occur from various sources such as lead-based paints, contaminated water, or certain occupations. The test is essential for diagnosing lead exposure and determining the need for treatment, as lead can cause serious health issues, particularly in children.

The other tests mentioned do not diagnose lead poisoning. For instance, Prothrombin Time evaluates blood coagulation and helps assess bleeding disorders, while the Lactic Acid Test measures lactic acid levels in the blood and is often related to conditions causing lactic acidosis. The Platelet Count assesses the number of platelets, which is useful in evaluating blood clotting disorders. None of these tests provide information specifically related to lead exposure or poisoning.