The RNA polymerase I in the nucleus transcribes :

The correct answer is Option (3) → 28s rRNA

Option (3) 28s rRNA — Correct. In eukaryotes three RNA polymerases share the work. RNA polymerase I transcribes the rRNAs: 28S, 18S and 5.8S; polymerase II makes hnRNA, and polymerase III makes tRNA, 5S rRNA and snRNA.

NCERT Extract:
Types of RNA and the Process of Transcription – “… There are at least three RNA polymerases in the nucleus (in addition to the RNA polymerase found in the organelles). There is a clear cut division of labour. The RNA polymerase I transcribes rRNAs (28S, 18S, and 5.8S), whereas the RNA polymerase III is responsible for transcription of tRNA, 5srRNA, and snRNAs (small nuclear RNAs). The RNA polymerase II transcribes precursor of mRNA, the heterogeneous nuclear RNA (hnRNA).”