Which of the following is one of the steps in the mechanism of the following reaction? 
Definitions:
Source Amnesia
A memory disorder where an individual is unable to remember the source of a specific memory while retaining the factual content.
Sensory Memory
It is the shortest-term element of memory which acts as a buffer for stimuli received through the senses, lasting typically less than a second.
Proactive Interference
A phenomenon where old information hinders the recall of newly learned information.
Retrieval Failure
A phenomenon in cognitive psychology where the inability to recall information is often due to the absence of proper cues or a failure in the retrieval process.
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