Assertion (A): Coliform is a group of bacteria found in human stomach.
Reason (R): Presence of coliform in water indicates contamination by disease causing microorganisms.

Options

A. Both Assertion and Reason are true and R is the correct explanation of A.
B. Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion
C. Assertion is true but Reason is false
D. Assertion is false and Reason is true

Explanation

To analyze the assertion and reason provided in the question, we can break it down step by step:

### Step 1: Evaluate the Assertion (A)
- **Assertion (A)** states that "Coliform is a group of bacteria found in human stomach."
- **Analysis**: Coliform bacteria are primarily found in the intestines of warm-blooded animals, including humans, but they are not specifically located in the stomach. They are considered part of the gut flora. Therefore, the assertion is **incorrect**.

### Step 2: Evaluate the Reason (R)
- **Reason (R)** states that "Presence of coliform in water indicates contamination by disease-causing microorganisms."
- **Analysis**: Coliforms are indeed used as indicator organisms in water quality testing. Their presence suggests that there may be contamination from fecal matter, which can harbor harmful pathogens. Therefore, the reason is **correct**.

### Step 3: Conclusion
- Since the assertion is false and the reason is true, we conclude that the correct relationship between the assertion and reason is:
- Assertion is false, Reason is true.

### Final Answer
The correct option is that the assertion is false and the reason is true.

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