Which application is the second ring of the life-saving chain, indicated by the question mark (?) Below?

One option

Which application is the second ring of the life-saving chain, indicated by the question mark (?) Below?

Medication

Damage detection

Basic life support

Crime scene assessment

Which application is the second ring of the life-saving chain, indicated by the question mark (?) Below?

#ماهي

#النسبة

#القصوى

#لانبعاث

#غاز

#ثاني

#اوكسيد

#الكربون

#من

#المركبات؟

#pماهي

#المركبات؟p

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