Which combining form pertains to gold?

• A. Aur/o
• B. Aur/i
• C. Aurum
• D. Gild/o

Answer: (A)

The main idea here is recognizing the Latin-derived combining form used for gold in medical terms. aur/o comes from aurum, the Latin word for gold, and it’s the form you attach to create terms that mean gold-related or gold-bearing, such as auriferous (bearing gold) or auric (golden). The other options aren’t standard medical combining forms for gold: aurum is the plain Latin noun for gold, not a combining form; gild/o suggests gilding as a verb idea rather than a medical term root; aur/i isn’t used as the recognized combining form for gold in terminology.