When \({\text{50 c}}{{\text{m}}^{\text{3}}}\) of a hydrocarbon, \({{\text{C}}_{\text{x}}}{{\text{H}}_{\text{y}}}\), was burned in excess oxygen, \({\text{200 c}}{{\text{m}}^{\text{3}}}\) of carbon dioxide and \({\text{250 c}}{{\text{m}}^{\text{3}}}\) of steam were produced (all volumes were measured under the same conditions). What is the molecular formula of the hydrocarbon?

A.     \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{4}}}\)

B.     \({{\text{C}}_{\text{3}}}{{\text{H}}_{\text{8}}}\)

C.     \({{\text{C}}_{\text{4}}}{{\text{H}}_{\text{8}}}\)

D.     \({{\text{C}}_{\text{4}}}{{\text{H}}_{{\text{10}}}}\)

D