Correct statement for Bakelite is :
(a) It is formed by phenol and foraldehyde
(b) It is crosslinked polymer
(c ) It is thermoseting plastic
(d) It is natural polymer

Options

A. a,d
B. a,b,c
C. a,b,d
D. c,d

Answer

To determine the correct statement about Bakelite, we will evaluate each option provided:

1. **Option (a): It is formed by phenol and formaldehyde.**
- Bakelite is indeed synthesized from the reaction of phenol and formaldehyde. This is a well-known fact in polymer chemistry. Therefore, this statement is **correct**.

2. **Option (b): It is a crosslinked polymer.**
- Bakelite is a type of thermosetting plastic that is formed through a crosslinking process during its polymerization. This means that the polymer chains are interconnected, which gives Bakelite its strength and durability. Thus, this statement is also **correct**.

3. **Option (c): It is a thermosetting plastic.**
- Bakelite is classified as a thermosetting plastic because, once it is set into a shape through heat and pressure, it cannot be remolded or melted again. This characteristic is a defining feature of thermosetting plastics. Therefore, this statement is **correct** as well.

4. **Option (d): It is a natural polymer.**
- Bakelite is a synthetic polymer, not a natural one. Natural polymers are derived from natural sources (like cellulose, proteins, etc.), while Bakelite is man-made. Hence, this statement is **incorrect**.

Now, summarizing the evaluations:
- Options (a), (b), and (c) are correct statements about Bakelite.
- Option (d) is incorrect.

Thus, the correct answer is that options (a), (b), and (c) are correct, which corresponds to option **B**.

### Final Answer:
The correct statement for Bakelite is option **B** (A, B, and C are correct).