Read the following four statements (A-D):
a) Colostrum is recommended for the new born because it is rich in antigens.
b) Chikungunya is caused by a Gram negative bacterium.
c) AIDS is characterized by decrease in T-helper cell
d) Metastasis is a property of benign tumors
How many of the above statements are wrong?

Options

A. Four
B. One
C. two
D. Three

Answer

To determine how many of the statements (A-D) are wrong, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A: "Colostrum is recommended for the newborn because it is rich in antigens."**
- **Analysis:** Colostrum is the first milk produced by mothers after giving birth. It is rich in antibodies (especially IgA) which help in providing immunity to the newborn. However, it is not rich in antigens. Antigens are foreign substances that trigger an immune response, while colostrum helps in building immunity through antibodies. Therefore, this statement is **incorrect**.

2. **Statement B: "Chikungunya is caused by a Gram negative bacterium."**
- **Analysis:** Chikungunya is actually caused by the chikungunya virus, which is transmitted by Aedes mosquitoes. It is not caused by a bacterium, let alone a Gram-negative one. Thus, this statement is also **incorrect**.

3. **Statement C: "AIDS is characterized by decrease in T-helper cells."**
- **Analysis:** AIDS (Acquired Immunodeficiency Syndrome) is indeed characterized by a decrease in T-helper cells (CD4+ T cells). The HIV virus attacks and reduces the number of these cells, leading to weakened immunity. Therefore, this statement is **correct**.

4. **Statement D: "Metastasis is a property of benign tumors."**
- **Analysis:** Metastasis refers to the spread of cancer cells from the original tumor to other parts of the body. This property is associated with malignant tumors, not benign tumors. Benign tumors do not spread; they remain localized. Hence, this statement is **incorrect**.

### Conclusion:
- **Incorrect Statements:** A, B, and D are incorrect.
- **Total Number of Incorrect Statements:** 3

Thus, the answer to the question is that **3 statements are wrong**.

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