Given below are four statements each with one or two blanks. Select the option which correctly fills up the blanks in any two statements.
(A). The embryo with 8 to 16 blastomeres is called a (i)._____
(B). Embedding of the (i)._____ in the endometrium of the uterus is called implantation and it leads to (ii). ______
(C). After implantation finger like projections appear on the trophoblast called (i)._____ which are surrounded by the (ii)._____ abnd maternal blood.
(D). Inner cell mass contains certain cells called (i)._____ cells which have the potency to give rise to all the tissues and organs.

Options

A. (A)-(i) blastula, (C)-(i) chorionic villi, (ii)-uterine tissue
B. (B)-(i) blastocyst, (ii) pregnancy, (D)-(i) stem
C. (A)-(i) morula, (D)-(i) sertli
D. (B)-(i) morula, (ii) parturition, (C)-(i) fimbriae, (ii)-embryonic tissue

Answer

To solve the question, we need to fill in the blanks in the provided statements correctly. Let's analyze each statement step by step.

### Step-by-Step Solution:

**Statement A:**
- The embryo with 8 to 16 blastomeres is called a (i). **Morula**.
- Explanation: The morula is a solid ball of cells that forms after several rounds of cell division (cleavage) following fertilization.

**Statement B:**
- Embedding of the (i). **Blastocyst** in the endometrium of the uterus is called implantation and it leads to (ii). **Pregnancy**.
- Explanation: The blastocyst is the stage of the embryo that implants into the uterine lining, and successful implantation is what leads to pregnancy.

**Statement C:**
- After implantation, finger-like projections appear on the trophoblast called (i). **Chorionic villi** which are surrounded by the (ii). **Uterine tissue** and maternal blood.
- Explanation: Chorionic villi are essential for nutrient exchange between the mother and the developing embryo, and they are surrounded by maternal blood and uterine tissue.

**Statement D:**
- Inner cell mass contains certain cells called (i). **Stem cells** which have the potency to give rise to all the tissues and organs.
- Explanation: Stem cells in the inner cell mass are pluripotent, meaning they can differentiate into any cell type in the body.

### Correctly Filled Statements:
- **A:** Morula
- **B:** Blastocyst, Pregnancy
- **C:** Chorionic villi, Uterine tissue
- **D:** Stem cells

### Conclusion:
The option that correctly fills the blanks in any two statements is **Option 2**:
- For Statement B: (i) Blastocyst, (ii) Pregnancy
- For Statement D: (i) Stem cells