Which of the following is not a symptom of carbon monoxide exposure?

nausea

headaches

muscle spasms

fatigue

Answer: Muscle Spasms

Explanation: Muscle spasms are caused mostly because of stress, drinking too much coffee, dehydration, lack of sleep, electrolyte imbalance and some medication such as diuretics since they lower the amount of certain minerals in one's body. When muscles pulse or can not relax they twitch. It can affect just a part or a whole group of muscles and can lead to different symptoms.