A. Gastric juice
B. Optic nerve
C. Sperm
D. Dandruff

A. Oxygen,-iron, and potassium.
B. Oxygen, iron and silicon
C. Silicon, aluminum and oxygen
D. Silicon, iron, and magnesium

A. Chlorine and sodium
B. Chlorine and sodium hydroxide
C. Chlorine, hydrogen, and sodium hydroxide
D. Hydrogen and chlorine

A. Carbon dioxide
B. Hydrogen
C. Nitrogen
D. Oxygen

A. Gold
B. Iron
C. Platinum
D. Tungsten

A. Cough
B. Indigestion
C. Pain
D. Fever

A. Electron affinity
B. Electro negativity
C. lonization Energy
D. None of these

A. Magnesium
B. Phosphorous
C. Chlorine
D. Aluminium

A. Fluorine
B. lodine
C. Chlorine
D. Bromine

A. Hydrogen
B. Oxygen
C. Carbon
D. Helium