The blood group system was discovered by __________.
- AFriedrich Stromeyer
- BKarl Wilhelm Scheele
- CWilliam Murdock
- DKarl Landsteiner
Solution & Step-by-step Explanation
Austrian immunologist and biologist Karl Landsteiner discovered the main ABO blood group system in the year 1900. He received the Nobel Prize in Physiology or Medicine in 1930 for this monumental discovery.