Which term best describes anomalies present at birth irrespective of cause?

• A. Congenital defects
• B. Acrosome
• C. Alleles
• D. Diploid

Answer: (A)

Anomalies that exist at birth are described as congenital. The term conveys the timing—present at birth—without specifying what caused them, whether genetic factors, developmental environmental influences, or unknown reasons. That makes congenital defects the right description for anomalies seen from birth regardless of cause. By contrast, the other terms describe unrelated concepts: an acrosome is a part of a sperm cell, alleles are different forms of a gene, and diploid refers to having two sets of chromosomes.