Multiple choice Which of the following is/are the fluorescent stains? Osmium tetroxide Rhodamine Hoechst stains Fluorescent stains, types - 33258 and 33342 Both the options 3 and 4 Reveal answer Fill a bubble to check yourself E Correct answer Explanation Both option 3 and 4 are correct because fluorescent stains, type- 33258 and 33342, are Hoechst Stains and these are used to stain DNA in living cells.