Q1 · medium · AI-verified
Which vitamin is synthesized by the skin when exposed to sunlight?
- Vitamin A
- Vitamin C
- Vitamin D
- Vitamin K
Q2 · medium · AI-verified
Which hormone regulates blood sugar levels in the human body?
- Adrenaline
- Insulin
- Thyroxine
- Growth hormone
Q3 · medium · AI-verified
Which of the following gases is primarily responsible for the greenhouse effect?
- Oxygen
- Carbon dioxide
- Nitrogen
- Hydrogen
Q4 · medium · AI-verified
What is the main cause of muscle cramps during exercise?
- Excess oxygen
- Dehydration and electrolyte imbalance
- Too much protein
- Low blood pressure
Q5 · medium · AI-verified
What is the chemical formula of washing soda?
- NaCl
- Na2CO3
- NaHCO3
- Na2SO4