Give the names of any two elements

Give the names of any two elements present in the following compounds:
Baking powder, common salt, sulphuric acid

Baking powder ($NaHC{{O}{3}}$ ) Sodium, hydrogen, carbon and oxygen.
Common salt (NaCl) Sodium and chlorine.
Sulphuric acid ($H
{2}SO_{4}$) Sulphur, hydrogen and oxygen.