What are the shells of aquatic snails and clams made of?
ক) Sulphate
খ) Carbonate
গ) Phosphate
ঘ) Nitrate
Related Questions
ক) Copper
খ) Zinc
গ) Aluminium
ঘ) Lead
ক) Pole star
খ) Direction of airflow
গ) Latitude
ঘ) Ocean current
ক) between 40º and 47º South
খ) between 40º and 47º North
গ) between 61º and 67º South
ঘ) between 61º and 67º North
ক) +5 V
খ) -5 V
গ) +12 V
ঘ) -12 V
ক) karim@xyz.com
খ) c:/windows
গ) aol.com
ঘ) index.html
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