<prompt> Feulgen reaction is a cytochemical test for the detection of:DNAm-RNAt-RNAAll of the above  <response>: Feulgen reaction: It is an aldehyde specific reaction based on the formation of a purple coloured compound when aldehyde reacts with fuchsin-sulfuric acid. It is used in histology to identify chromosomal material or DNA in cell specimens. Ref: DNA Cytometric Analysis By Andres Sampedro, Page 78 