Early embryonic developmental stages constitute
(a) Functional state
(b) Prefunctional state
(c) Transitional growth
(d) Fundamental growth

Options

A. Functional state
B. Prefunctional state
C. Transitional growth
D. Fundamental growth

Answer

To solve the question regarding the early embryonic developmental stages, we need to analyze the options provided and understand the characteristics of early embryonic development.

### Step-by-Step Solution:

1. **Understanding Early Embryonic Development**: Early embryonic development refers to the initial stages following fertilization, typically covering the first two weeks of development. During this period, the zygote undergoes rapid cell division (cleavage) and begins the process of differentiation.

2. **Identifying the Stages**: The question asks about the state that characterizes early embryonic development. The options are:
- (a) Functional state
- (b) Prefunctional state
- (c) Transitional growth
- (d) Fundamental growth

3. **Analyzing Each Option**:
- **Functional State**: This stage refers to when the embryo is fully developed and capable of performing functions necessary for survival. This does not apply to early embryonic stages.
- **Prefunctional State**: This stage involves the period before the embryo starts to function in a mature way. It includes the initial cell divisions and differentiation processes that occur in the early stages of development.
- **Transitional Growth**: This term typically refers to a phase where the embryo is transitioning from one state to another, but it does not specifically describe early embryonic development.
- **Fundamental Growth**: This term is more general and does not specifically apply to the early stages of embryonic development.

4. **Conclusion**: Based on the analysis, the early embryonic developmental stages are best described by the **prefunctional state**, as this stage encompasses the rapid cell division and initial differentiation that occurs before the embryo begins to function in a mature capacity.

### Final Answer:
(b) Prefunctional state