Dietary manganese — Which pair of commonly consumed beverages together contributes roughly 20–30% of typical daily manganese intake in many diets?

Introduction / Context:
Manganese (Mn) is a trace element required for antioxidant enzymes (e.g., Mn-superoxide dismutase) and for carbohydrate and lipid metabolism. Beverages can be significant contributors to Mn intake depending on brewing methods and plant sources. This item asks you to identify the pair most likely to provide about 20–30% of daily Mn for regular consumers.

Given Data / Assumptions:

• Black and green tea leaves are naturally rich in manganese.
• Coffee beans also contain appreciable manganese compared to dairy or soft drinks.
• The percentage contribution assumes habitual consumption (multiple cups per day).
• Milk and water have very low Mn; orange juice varies but is generally lower than brewed tea.

Concept / Approach:
Evaluate the manganese content typical of brewed beverages. Tea is consistently Mn-rich; coffee also contributes meaningful amounts. Milk, water, and most colas contribute minimal Mn relative to brewed plant infusions. Therefore, the most accurate pair is tea and coffee.

Step-by-Step Solution:

Verification / Alternative check:
Food composition tables consistently report higher Mn per serving for brewed tea, with coffee providing additional Mn; population-level intake studies often identify these as leading beverage contributors.

Why Other Options Are Wrong:

Common Pitfalls:
Equating vitamin C–rich beverages (like orange juice) with Mn-rich sources; these nutrients do not correlate.

Final Answer:
Tea and coffee.