Step 1: Understanding the Question.
The question asks which type of RNA plays a role in protein synthesis. mRNA (messenger RNA) is involved in carrying genetic information from the DNA to the ribosome for protein synthesis.
Step 2: Analyzing the Options.
- (A) mRNA is correct because it carries the genetic code from DNA to the ribosome for protein synthesis.
- (B) tRNA (transfer RNA) is important for translation but not for carrying the genetic code.
- (C) rRNA (ribosomal RNA) is part of the ribosome and helps in protein synthesis but does not carry the genetic code.
- (D) snRNA is involved in splicing and not in protein synthesis.
Step 3: Conclusion.
The correct answer is (A) mRNA.