**Question:** Regular drinking of which of the following can help prevent Urinary tract infection (UTI)?

**Core Concept:** Urinary tract infections are caused by bacteria, most commonly Escherichia coli (E. coli), that colonize and multiply in the urinary tract. Prevention of UTI involves maintaining a healthy urinary environment and promoting urine flow.

**Why the Correct Answer is Right:**

Correct Answer: **D. Citrus fruits and water**

Drinking a sufficient amount of water daily helps maintain a dilute urine concentration, which inhibits bacterial growth. Citrus fruits contain citrate, a substance that binds to calcium ions, preventing crystal formation within the urinary tract, thereby reducing the risk of UTI formation and recurrence.

**Why Each Wrong Option is Incorrect:**

A. **Tea and coffee:** These beverages contain diuretics like caffeine and tannins, which can lead to concentrated urine, promoting UTI formation.

B. **Alcohol:** Alcohol consumption increases urine output but can lead to dehydration, causing concentrated urine and predisposing to UTI.

C. **Diet soda:** Although it does not directly affect urine concentration, consuming high-sugar content can contribute to increased urine production and promote dehydration, increasing the risk of UTI.

**Clinical Pearl / High-Yield Fact:**

Avoiding diuretic-rich beverages, alcohol, and consuming water and citrus fruits can help maintain a healthy urinary environment, preventing the formation and recurrence of UTIs. Remember, maintaining adequate hydration is crucial for preventing UTIs by diluting urine and flushing out bacteria.