Select the pair of diseases that are caused by contaminated water.

Options

A. Cholera and typhoid
B. Diarrhoea and common cold
C. Pneumonia and typhoid
D. Malaria and pneumonia

Explanation

To solve the question of selecting the pair of diseases caused by contaminated water, we can follow these steps:

### Step 1: Understand the Concept of Contaminated Water
Contaminated water can carry various pathogens, including bacteria, viruses, and parasites, which can lead to several diseases when ingested or come into contact with humans.

**Hint:** Think about common waterborne diseases that are known to be caused by drinking or using contaminated water.

### Step 2: Identify Common Diseases Caused by Contaminated Water
Some well-known diseases caused by contaminated water include:
- Cholera
- Typhoid fever
- Dysentery
- Hepatitis A

**Hint:** Recall diseases that are often mentioned in the context of poor sanitation and hygiene.

### Step 3: Select a Pair of Diseases
From the list above, we can select pairs of diseases. For example:
- Cholera and Typhoid fever
- Dysentery and Hepatitis A

**Hint:** Look for pairs that are frequently discussed together in educational materials about waterborne diseases.

### Step 4: Confirm the Selection
Make sure that the selected diseases are indeed caused by contaminated water. Both cholera and typhoid fever are classic examples of diseases linked to water contamination.

**Hint:** Verify your choices by checking if they are listed in health resources or textbooks as waterborne diseases.

### Final Answer
The pair of diseases caused by contaminated water is **Cholera and Typhoid fever**.