Study the given portion of double stranded polynucleotide chain carefully. Identify a,b , c , and the 3' and 5' end of the chain

Explanation

To solve the question regarding the identification of components in a double-stranded polynucleotide chain, we will follow these steps:

### Step-by-Step Solution:

1. **Identify Component A**:
- In the double-stranded polynucleotide chain, component A represents the **hydrogen bonds** that hold the two strands together. These bonds can be either double bonds (between adenine and thymine) or triple bonds (between cytosine and guanine).

2. **Identify Component B**:
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