**Core Concept**
When transcribing DNA to RNA, the base pairing rules change: A in DNA pairs with U in RNA, C pairs with G, G pairs with C, and T pairs with A. This process is known as complementary base pairing.

**Why the Correct Answer is Right**
During transcription, the coding region of the DNA is read in a 5' to 3' direction and transcribed into a complementary RNA sequence. The given DNA sequence 5'-CGT-3' would be transcribed into a complementary RNA sequence, where the base pairing rules are applied. The correct RNA sequence would be 5'-CGA-3', where C in DNA pairs with G in RNA, G pairs with C, and T pairs with A.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided.
* **Option B:** This option is not provided.
* **Option C:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
When transcribing DNA to RNA, remember the base pairing rules: A in DNA pairs with U in RNA, C pairs with G, G pairs with C, and T pairs with A. This is crucial for understanding gene expression and molecular biology.

**Correct Answer: C. 5'-CGA-3'**