The fluid filled in the blastocoel cavity of blastula is

Options

A. Acidic
B. Albuminous
C. Saline
D. Pure water

Explanation

**Step-by-Step Solution:**

1. **Understanding the Blastula**: The blastula is an early stage of embryonic development, characterized by a hollow sphere of cells. It contains a fluid-filled cavity known as the blastocoel.

2. **Identifying the Fluid in the Blastocoel**: The fluid that fills the blastocoel is crucial for the development of the embryo. It provides a medium for cellular processes and supports the cells during early development.

3. **Composition of the Blastocoel Fluid**: The fluid in the blastocoel is primarily composed of albumin, which is a type of protein. This protein is essential for providing nutrition to the developing embryo.

4. **Other Characteristics of the Fluid**: The fluid has been described in various ways, but the correct identification is that it is albuminous. Other descriptions such as acidic, saline, or pure water are incorrect.

5. **Conclusion**: Therefore, the fluid filled in the blastocoel cavity of the blastula is albuminous, which means it contains albumin.

**Final Answer**: The fluid filled in the blastocoel cavity of the blastula is albuminous.

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