This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
Which of the following materials used to make jewelry will commonly cause contact dermatitis in sensitive individuals ? 
Select and explain. 
A. Sapphire, B. Silver, C. Gold, D. Nickel/chromium
D: Nickel/chromium
Answer: D: Nickel/chromium 
Explanation: - Nickel is commonly a component of an alloy used to make cheaper jewelry as well as buckles and snaps. -Individuals often develop a contact dermatitis from contact with this alloy.