**Core Concept**
In the process of gene expression, RNA splicing is a crucial step where introns (non-coding regions) are removed, and exons (coding regions) are joined together to form a mature messenger RNA (mRNA) molecule. This process is mediated by a specific type of RNA that plays a central role in RNA processing.

**Why the Correct Answer is Right**
The correct type of RNA involved in splicing is **small nuclear RNA (snRNA)**, specifically the U1, U2, U4, and U6 snRNAs. These snRNAs form a complex called the spliceosome, which recognizes the splice sites (consensus sequences) within the pre-mRNA molecule. The spliceosome then catalyzes the removal of introns and the ligation of exons, resulting in the formation of a mature mRNA molecule. The snRNAs play a crucial role in recognizing and binding to the splice sites, facilitating the splicing reaction.

**Why Each Wrong Option is Incorrect**
**Option A:** Messenger RNA (mRNA) is the product of splicing, not the type of RNA involved in the process.
**Option B:** Transfer RNA (tRNA) is involved in protein synthesis, not RNA splicing.
**Option C:** Ribosomal RNA (rRNA) is a component of ribosomes, where protein synthesis occurs, but it is not directly involved in RNA splicing.

**Clinical Pearl / High-Yield Fact**
The spliceosome is a dynamic complex that consists of over 150 different proteins and five snRNAs (U1, U2, U4, U5, and U6). Mutations in these snRNAs or the proteins that interact with them can lead to genetic disorders such as spinal muscular atrophy (SMA) and certain types of cancer.

**Correct Answer:** C.