This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Transcription is the synthesis of 
Select and explain. 
A. Single stranded complimentary copy of DNA, B. Double stranded complimentary copy of DNA, C. Complimentary copy of RNA, D. Complimentary copy of rRNA
A: Single stranded complimentary copy of DNA
Answer: A: Single stranded complimentary copy of DNA 
Explanation: None