In majority of plants fertilization is

Options

A. External
B. Internal and oogamous
C. Isogamous
D. External and oogamous

Answer

To answer the question "In majority of plants fertilization is," we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding Fertilization**:
- Fertilization is the process where male and female gametes fuse to form a zygote. This can occur either internally (inside the organism) or externally (outside the organism).

2. **Analyzing the Options**:
- **Option 1: External**: This refers to fertilization occurring outside the body. This type is primarily seen in bryophytes (like mosses) and some pteridophytes (like ferns). However, this is not the majority of plants.
- **Option 2: Internal Oogamous**: Internal fertilization occurs inside the body, and "oogamous" refers to a type of sexual reproduction where the male and female gametes are different in size and structure (e.g., sperm and egg). This is common in many higher plants (angiosperms).
- **Option 3: Isogamous**: Isogamous fertilization involves gametes that are identical in size and shape. This is not typical for the majority of plants; it is more common in certain algae.
- **Option 4: External and Oogamous**: This option combines external fertilization with oogamous reproduction. Since external fertilization is not common in the majority of plants, this option is also incorrect.

3. **Conclusion**:
- After analyzing all the options, we find that the majority of plants exhibit internal fertilization and are oogamous. Therefore, the correct answer is **Option 2: Internal Oogamous**.

### Final Answer:
The correct answer is **Option 2: Internal Oogamous**.