**Core Concept**
Adenine (A) and Guanine (G) are the purine bases found in DNA, and their pairing is facilitated by specific hydrogen bonding patterns. The triple bonds in this context refer to the unique chemical bond between these bases, which is essential for the stability and structure of DNA.

**Why the Correct Answer is Right**
The correct answer, B. C–G, is due to the specific hydrogen bonding patterns between adenine and guanine. Adenine forms two hydrogen bonds with thymine (T) through a double-stranded DNA structure, but it forms three hydrogen bonds with guanine. This is because guanine has a larger molecular structure than thymine, allowing for the additional hydrogen bond. This triple bond between adenine and guanine is crucial for maintaining the stability of the DNA double helix.

**Why Each Wrong Option is Incorrect**
**Option A:** A–T is incorrect because adenine and thymine form two hydrogen bonds, not three. The double bond between these bases is essential for the stability of the DNA double helix.
**Option C:** A–G is incorrect because adenine and guanine form three hydrogen bonds, but this is not the correct representation of the base pairing. Adenine pairs with thymine, and guanine pairs with cytosine.
**Option D:** C–T is incorrect because cytosine and thymine do not form triple bonds. Cytosine forms three hydrogen bonds with guanine, not thymine.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the base pairing in DNA is not random and is governed by specific hydrogen bonding patterns. The triple bond between adenine and guanine is a critical aspect of DNA structure and stability, and understanding this concept is crucial for grasping the fundamental principles of molecular biology.

**✓ Correct Answer: B. C–G**