Which one of the following is a water soluble vitamin, that is not excreted easily?

CNG is an important transportation fuel. When 100 g CNG is mixed with 208 g oxygen in vehicles, it leads to the formation of CO₂ and H₂O and produces large quantity of heat during this combustion, then the amount of carbon dioxide, produced in grams is ____________. [nearest integer]

[Assume CNG to be methane]

Amongst SF₄, XeF₄, CF₄ and H₂O, the number of species with two lone pairs of electrons is _____________.

A fish swimming in water body when taken out from the water body is covered with a film of water of weight 36 g. When it is subjected to cooking at 100$$^\circ$$C, then the internal energy for vaporization in kJ mol^$$-$$1 is ___________. [nearest integer]

[Assume steam to be an ideal gas. Given $$\Delta$$_vapH$$^\Theta $$ for water at 373 K and 1 bar is 41.1 kJ mol^$$-$$1 ; R = 8.31 J K^$$-$$1 mol^$$-$$1]