Only to use nitrates when heart pain is active and progressing. Afterwards, see your heart specilist..
Answer:
Actually, D is the correct answer
I dont want to mislead you, but I believe the answer is A because letter B is wrong because plants go through cellular respiration and photosynthesis, whereas animals go through cellular respiration but not photosynthesis, and for C, I've never heard of that so it doesnt seem likely.
