Read the passage given below and answer the following question.
The process of copying genetic information from one strand of the DNA into RNA is termed as transcription. Here also, the principle of complementarity governs the process of transcription, except the adenosine complements now forms base pair with uracil instead of thymine. A transcription unit in DNA is defined primarily by the three regions in the DNA. There is a convention in defining the two strands of the DNA in the structural gene of a transcription unit. Since the two strands have opposite polarity and the strand that has the polarity 3'→5' acts as a template, and is also referred to as template strand. The other strand which has the polarity (5'→3') and the sequence same as RNA (except thymine at the place of uracil), is displaced during transcription. Strangely, this strand (which does not code for anything) is referred to as coding strand. The promoter and terminator flank the structural gene in a transcription unit. It is a DNA sequence that provides binding site for RNA polymerase, and it is the presence of a promoter in a transcription unit that also defines the template and coding strands.

In transcription, the principle of complementarity is followed, but instead of thymine, adenosine pairs with:

Uracil

The correct answer is Option (2) →Uracil

Transcription is the process by which the genetic information encoded in DNA is copied into a molecule of RNA. This is crucial for protein synthesis. The process follows the principle of complementarity, which means that the base pairs on the DNA strand align with specific nucleotides on the RNA strand.

In DNA, adenine (A) pairs with thymine (T), and guanine (G) pairs with cytosine (C). However, during transcription, RNA is produced instead of DNA. In RNA, adenine pairs with uracil (U) instead of thymine. So, if the DNA sequence has an adenine, the corresponding base on the RNA strand will be uracil.