The diagnosis of cancer can be performed by using techniques such as

Options

A. Biopsy
B. MRI
C. Computed tomography
D. All of these

Answer

To solve the question regarding the diagnosis of cancer and the techniques that can be used, we can follow these steps:

### Step 1: Understand the Techniques
First, we need to identify the techniques mentioned in the question:
- **Biopsy**: This is a procedure where a sample of tissue is taken from the body to check for cancer cells. It is often considered the definitive method for diagnosing cancer.
- **MRI (Magnetic Resonance Imaging)**: This imaging technique uses strong magnets and radio waves to create detailed images of organs and tissues inside the body. It helps in identifying tumors and assessing their size and location.
- **Computed Tomography (CT)**: This is a specialized X-ray technique that produces cross-sectional images of the body. It is useful for detecting tumors and understanding their extent.

### Step 2: Evaluate the Options
Now, we evaluate the options given in the question:
- **Option A: Biopsy** - A valid technique for cancer diagnosis.
- **Option B: MRI** - A valid imaging technique for cancer diagnosis.
- **Option C: Computed Tomography** - Another valid imaging technique for cancer diagnosis.
- **Option D: All of these** - This option suggests that all the previous techniques can be used for cancer diagnosis.

### Step 3: Determine the Correct Answer
Since all the mentioned techniques (biopsy, MRI, and computed tomography) are indeed used in the diagnosis of cancer, the correct answer would be:
- **Option D: All of these**

### Final Answer
The diagnosis of cancer can be performed by using techniques such as:
**D. All of these**

---