A. Umbilical cord contain blood vessel from embryo
B. Umbilical cord joins the placenta and the embryo
C. Umbilical cord carries wastes and nutrients
D. It contains blood vessel from mother

Options

A. All are correct
B. All are incorrect
C. Only D is incorrect
D. Only A is correct

Answer

To solve the question regarding the statements about the umbilical cord, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A: "Umbilical cord contains blood vessels from embryo."**
- The umbilical cord is primarily composed of blood vessels that carry fetal blood. It does not contain blood vessels from the mother. Therefore, this statement is **correct**.

2. **Statement B: "Umbilical cord joins the placenta and the embryo."**
- The umbilical cord connects the developing embryo (or fetus) to the placenta. The placenta is the organ that facilitates nutrient and waste exchange between the mother and the fetus. Thus, this statement is also **correct**.

3. **Statement C: "Umbilical cord carries wastes and nutrients."**
- The umbilical cord does indeed transport nutrients from the placenta to the fetus and carries waste products from the fetus back to the placenta for disposal. Therefore, this statement is **correct**.

4. **Statement D: "It contains blood vessels from mother."**
- The umbilical cord does not contain blood vessels from the mother; it contains only fetal blood vessels. Hence, this statement is **incorrect**.

### Summary of Statements:
- A: Correct
- B: Correct
- C: Correct
- D: Incorrect

### Conclusion:
The correct answer is that statements A, B, and C are correct, while statement D is incorrect. Therefore, the option that states "only D is incorrect" is the right choice.