Which of the following feature(s) is/are exclusive in angiosperms :-
(A) Seed
(B) Double fertilization
(C) Female gametophyte
(D) Presence of flowers
(E) Formation of endosperm
(F) Presence of vessels and companion cells
Tick the right one :-

Options

A. A,B,C,E
B. B,C,D,E
C. B,D,E
D. A,B,C,D

Answer

To determine which features are exclusive to angiosperms, let's analyze each option provided:

1. **Seed (A)**: Seeds are not exclusive to angiosperms, as gymnosperms also produce seeds. Therefore, this feature is not exclusive to angiosperms.

2. **Double fertilization (B)**: This is a unique process that occurs in angiosperms. In double fertilization, one sperm fertilizes the egg to form the zygote, while the other sperm fuses with two polar nuclei to form the triploid endosperm. This process is exclusive to angiosperms.

3. **Female gametophyte (C)**: Female gametophytes are present in both angiosperms and gymnosperms, so this feature is not exclusive to angiosperms.

4. **Presence of flowers (D)**: Flowers are a defining characteristic of angiosperms and are not found in other plant groups. Therefore, this feature is exclusive to angiosperms.

5. **Formation of endosperm (E)**: The endosperm is formed during the fertilization process in angiosperms and serves to nourish the developing embryo. This formation is also exclusive to angiosperms.

6. **Presence of vessels and companion cells (F)**: While angiosperms do have vessels and companion cells, some gymnosperms also possess vessel elements, although they are less common. Therefore, this feature is not entirely exclusive to angiosperms.

Based on this analysis, the features that are exclusive to angiosperms are:
- **Double fertilization (B)**
- **Presence of flowers (D)**
- **Formation of endosperm (E)**

Thus, the correct options are B, D, and E.

### Final Answer:
The features exclusive to angiosperms are (B) Double fertilization, (D) Presence of flowers, and (E) Formation of endosperm.

---