In the figure provided below,what type of igneous intrusion is the vertical rock unit shown by letter A? 
Definitions:
Tip-Of-The-Tongue Phenomenon
A cognitive condition where a person is unable to recall a familiar word or name, experiencing a temporary block or lapse in memory.
Encoding Problems
Difficulties in converting information into a form that can be stored and retrieved from memory, often affecting learning and retention.
Flashbulb Memory
A vivid, detailed memory of an emotionally significant moment or event.
Eidetic Image
An unusually vivid and detailed mental image that retains visual details, often referred to as a "photographic memory."
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