(A) is a colourless solid, it metal when heated and gives of a gas (B) Which is supporter of combustion , if heating is contimed the white of the solid disuppears , When (A) is heatyed with an aqueous `NaOH` solution , an alkaline gas (C ) is evolved ,When gas(B) is leasted with sodumine ,a colourless solid (D) is formed .When (D) is heated with dil `H_(2)SO_(4)` a colourless liquid (F) is formed .
The compound C has
A. Linear geometry
B. Pyramidal
C. Terehedral
D. None of these