"It was discussed before in this forum. If i remember well the response is NO."

Correct on both counts!

To summarise:

There is a 1:1 correspondence between assembler instructions an machine instructions - each assembler instruction generates precisely one machine instruction; therefore, conversely, each machine instruction can be generated by only one assembler instruction.
(the "only" problem is knowing whether a particular byte in your binary is actually an instruction or not...)

In a high-level language (eg, 'C') you have no such guarantee - especially with an optimising compiler!
Therefore it is impossible to determine what 'C' source generated a particular piece of assembler.