The answer is b, decrease the oxygen gas pressure
Dendrochronologist
<span>Dendrochronology (or tree-ring dating) is the scientific method of dating <span>tree rings.</span></span>
It is an organic substance.
The answer is penicillin
Rheumatic fever is a disease that caused by Group A streptococcus infection. The bacteria has component that similar to the heart valve cells, makes the immune cell attack it. The drug of choice for this infection is penicillin G benzathine injection. It is one of penicillin family drug that has high prevalence of allergy reaction, so you must be aware.
The answer is palpitation.
