Which of the following statements is correct?

Options

A. Caprolactum is the monomer of nylon 6, 6
B. Terylene is a polyamide
C. Phenol formaldehyde resin is known as malamine
D. Butadiene is not the monomer of natural rubber

Answer

To determine which of the statements is correct, we will analyze each statement one by one.

### Step 1: Analyze the first statement
**Statement:** Caprolactam is a monomer of nylon 6,6.
**Analysis:** This statement is incorrect. Caprolactam is actually the monomer used to produce nylon 6, not nylon 6,6. Nylon 6,6 is made from hexamethylenediamine and adipic acid.

### Step 2: Analyze the second statement
**Statement:** Pteridine is a polyamide.
**Analysis:** This statement is also incorrect. Pteridine is not a polyamide; it is classified as a heterocyclic compound and is more closely related to polyesters.

### Step 3: Analyze the third statement
**Statement:** Phenol and formaldehyde resin is known as melamine.
**Analysis:** This statement is incorrect. The resin formed from phenol and formaldehyde is known as Bakelite, not melamine. Melamine is made from melamine and formaldehyde.

### Step 4: Analyze the fourth statement
**Statement:** Butadiene is a monomer of natural rubber.
**Analysis:** This statement is incorrect. Natural rubber is primarily made from the monomer isoprene (2-methyl-1,3-butadiene), not butadiene.

### Conclusion
After analyzing all four statements, we find that all of them are incorrect. However, if we consider the context of the question, it seems that the fourth statement is the least incorrect in the context of common misconceptions about rubber. Therefore, the answer is:

**Correct Statement:** None of the statements are correct, but the fourth statement is the most misleading as it suggests a common misunderstanding.

### Final Answer
The correct answer is that all statements are incorrect, but the fourth statement is the most misleading.

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