(a) Carbon (IV) oxide ;/Oxygen/ urea/Food substances/ Ions;
(b) (i) b
(ii) A
(iii) A; AB;
(c) A hypersensitive reaction to an antigen by the body/over reaction by the body to certain foreign substances introduced into it or exposed to it
(d)
- Drugs such as penicillin, chloroquine, aspirin;
- Dust;
- Pollen grains
-Certain foods such as meat eaten/amino- acids
marto answered the question on September 30, 2019 at 10:47
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