Answer:
Source amnesia
Explanation:
Source amnesia is related when a person is not able to recall the source of information that is called the source of amnesia. In this process, a person remembers the source of material but does not remember when, where and how that happened. The source amnesia affected a person's explicit memory that is being related to a person day to day life activity such as birthday, lunch dinner, dates, etc. The source of amnesia occurred when something we heard, not heard for a long time and we forget that when that thing happened and how that happened. It occurs due to the failure of encoding in the memory.