Answer:
If this is what you're asking about I think this is it.
Explanation:
I think you should probably ask a doctor or someone else who knows about these things, but I want to help.
What medicine can I take at 4 weeks pregnant?
: In general, doctors say it is usually safe to take:
Acetaminophen (such as Tylenol) for fever and pain.
Penicillin and some other antibiotics.
HIV medicines.
Some allergy medicines, including loratadine (such as Alavert and Claritin) and diphenhydramine (such as Benadryl).
Some medicines for high blood pressure.

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Answer:
gas and a lighter.
Explanation:
if you do not like the answer that i have presented you with on this fine day then you are a smelly sea pickle.
Answer: Carbon-14
Explanation:
Carbon dating the procedure which is used for the substances which is used to date the substances less than 40,000.
This method is based on an unstable isotope of carbon that living animals and plants incorporate inside it.
When the organisms are alive the ratio of stable isotope inside the organism is same to the ratio that is found in the atmosphere.
As the organism dies the carbon 14 gets converted into nitrogen 14. By measuring both the ratios, the relative age can be determined.