Indicate Whether the Following Pairs of Molecules Can Interact Via

Indicate whether the following pairs of molecules can interact via hydrogen bonding and give your reasoning.
A) CH₃NH₂ to CH₃NH₂;
B) CH₃CH₂OH to CH₃OCH₃;
C) CH₃CH₂CHO to CH₃OCH₃; and
D) (CH₃)₃N to CH₃COCH₃.