Which of the following is used for taking the `X-`ray spectra of the digestive system:

Options

A. `CaSO_(4)`
B. `BaSO_(4)`
C. `MgSO_(4)`
D. `BaCO_(3)`

Explanation

To answer the question regarding which substance is used for taking X-ray spectra of the digestive system, we can follow these steps:

### Step 1: Identify the Purpose of the Substance
We need a substance that can be used in radiology to visualize the gastrointestinal (GI) tract through X-ray imaging.

**Hint:** Think about substances that are opaque to X-rays and can be ingested.

### Step 2: Recall Common Substances Used in Radiology
In radiology, barium compounds are commonly used for imaging the digestive system. Barium sulfate is specifically known for its use in X-ray imaging.

**Hint:** Consider the properties of barium and its compounds in relation to X-ray imaging.

### Step 3: Understand the Procedure
The procedure involves the patient consuming a barium sulfate solution. This allows the barium to coat the lining of the GI tract, making it visible on X-ray images.

**Hint:** What happens to the barium once ingested? How does it help in imaging?

### Step 4: Analyze the Results
Once the barium sulfate is ingested, X-ray images are taken to observe the gastrointestinal tract. This helps in diagnosing conditions such as ulcers or other abnormalities.

**Hint:** Think about what kind of health issues can be diagnosed using this imaging technique.

### Conclusion
Based on the above steps, the substance used for taking X-ray spectra of the digestive system is **barium sulfate**. It is specifically used in radiology to visualize the gastrointestinal tract.

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