- Red, green and blue
- Orange, back and violet
- White. red and yellow
- Yellow, green and blue
- sodium
- iron
- aluminium
- lithium
- Carbon dioxide
- Chlorofluorocarbons
- Nitrogen oxides
- None of the above
- Neon
- Argon
- Xenon
- Nitrous oxide
- Chlorine
- Nitrogen
- Ammonia
- Carbon dioxide
- Dental
- Leprosy
- Headache
- Migraine
- Betelgeuse
- Sirius
- Rigel
- Polaris
- Sun
- Moon
- Venus
- Mercury
- Sunflower
- Pitcher plant
- Brassica Plant
- None of these
- Thoracic
- Pelvic
- Lumbar
- none
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