Identify the wrong statements
A. The tumor of haematopoetic cells is called leukemia
B.Cancer arising from the epithelial tissues of internal organs and glands is referred as melanoma
C. Sarcoma is a type of cancer where bone and cartilages are involved
D. Only benign tumors are called as true cancer or neoplasm

Options

A. a and b
B. b and d
C. b and c
D. a and c only

Answer

To identify the wrong statements from the given options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A**: "The tumor of haematopoietic cells is called leukemia."
- **Analysis**: This statement is correct. Leukemia is indeed a cancer that originates from hematopoietic (blood-forming) cells, primarily affecting the bone marrow and blood.

2. **Statement B**: "Cancer arising from the epithelial tissues of internal organs and glands is referred to as melanoma."
- **Analysis**: This statement is incorrect. Melanoma specifically refers to a type of skin cancer that originates from melanocytes, which are pigment-producing cells in the skin. The cancer arising from epithelial tissues of internal organs and glands is generally referred to as carcinoma, not melanoma.

3. **Statement C**: "Sarcoma is a type of cancer where bone and cartilages are involved."
- **Analysis**: This statement is correct. Sarcomas are cancers that arise from connective tissues, including bone, cartilage, fat, and muscle.

4. **Statement D**: "Only benign tumors are called as true cancer or neoplasm."
- **Analysis**: This statement is incorrect. Benign tumors are non-cancerous and do not invade surrounding tissues. In contrast, malignant tumors are considered true cancers (neoplasms) because they can invade nearby tissues and spread to other parts of the body.

### Conclusion:
The wrong statements are **B** and **D**.

### Final Answer:
The wrong statements are B and D.

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