Multiple choice Which of the following were discovered by Albrecht Kossel? Arginine Histidine Agmatine Carnosine Carnitine Both 1 and 2 Only 1, 2 and 3 Both 2 and 3 Only 2, 3 and 4 Both 4 and 5 Reveal answer Fill a bubble to check yourself C Correct answer Explanation This is the correct answer.