The correct answer would be
A. Eustachian tubes
The fibrous connective tissue that holds bones together is called ligament.
Gun control<span> (or firearms regulation) is the set of laws or policies that regulate the manufacture, sale, transfer, possession, modification, or use of firearms by civilians.
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Hepatitis B refers to the STI which cannot be treated with antibiotics.
<h3>What is Antibiotics?</h3>
These are chemicals which are used a treat a wide range of bacterial infections such as syphilis etc.
Hepatitis B is caused by a virus and can be managed by antiviral drugs while the other options such as gonorrhea are caused by bacteria and can be treated with antibiotics.
Read more about Antibiotics here brainly.com/question/7385027
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Take it by direction. Like if it says twice a day take it twice a day, once a day take it once. If you miss one pill don't take two to catch up.