Question
Identify labels A, B, C, D.



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| Valves in heart | Location |
| (1) Bicuspid/Mitral valve | (a) Opening of inferior vena cava |
| (2) Tricuspid valve | (b) Opening of coronary sinus |
| (3) Eustachian valve | (c) Left atrioventricular aperture |
| (4) Thebesian valve | (d) Right atrioventricular aperture |
| Column I | Column II |
| (a) Metchnikoff | (i) ABO Blood group system |
| (b) Fleming | (ii) Concept of immunity |
| (c) Edward Jenner | (iii) Phagocytic cells |
| (d) Karl Lands teiner | (iv) Lysozyme |
| Disorders/Diseases/ Health conditions | Recombination protein (s) |
| Atherosclerosis Platelet derived growth factor Anaemia Parturition Blood clots Diabetes Haemophilia A Haemophilia B | Platelet derived growth factor |
| (Factor VIII, Insulin, Relaxin, Factor IX, Erythropoietin, Tissue plasminogen activator | |
| Column A | Column B |
| (1) Symbiont in root nodule | ————- |
| (2) Conversion of nitrite to nitrate | ———— |
| (3) Denitrification process | ————- |
| (4) Conversion of ammonia to nitrite | ————- |