What is the correct order of increasing boiling point?

A.     ${{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}} < {\text{HCHO}} < {\text{C}}{{\text{H}}_{\text{3}}}{\text{OH}}$

B.     ${\text{HCHO}} < {{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}} < {\text{C}}{{\text{H}}_{\text{3}}}{\text{OH}}$

C.     ${\text{C}}{{\text{H}}_{\text{3}}}{\text{OH}} < {\text{HCHO}} < {{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}}$

D.     ${{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}} < {\text{C}}{{\text{H}}_{\text{3}}}{\text{OH}} < {\text{HCHO}}$

A