Aneonatal toxicologist's primary research interest is the first of life.

His primary research is the first Month of life. The Neonatal Toxicologist is in charge of evaluating if there was any contamination in the neonate at the time of his birth that could affect his life or his development. Among the toxins that may affect the newborn are medicines, infections of the mother or environmental toxins.

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A, c, and d are the answers