Multiple choice The dyes used to stain cartilage in bone specimens is alizarin red 2G bismarck brown Y congo red Reveal answer Fill a bubble to check yourself C Correct answer Explanation Bismarck brown Y is a diazo dye. It is used in histology for staining tissues. It stains acid mucins to yellow colour. It can be used with live cells. It is also used to stain cartilage in bone specimens.