Final answer:
The intracranial complication of CSOM that is considered as a silent complication is a brain abscess, which can go unnoticed due to its insidious symptoms, unlike meningitis, labyrinthitis, or facial nerve paralysis that show more immediate and obvious signs.
Step-by-step explanation:
The intracranial complication of Chronic Suppurative Otitis Media (CSOM) that often presents as a silent complication is a brain abscess. Compared to the other options, a brain abscess might not manifest immediately with overt symptoms and can therefore go unnoticed for a period of time. On the other hand, meningitis typically presents with indications such as severe headache, fever, and stiff neck, making it more recognizable. Labyrinthitis usually presents with symptoms including vertigo and hearing loss, while facial nerve paralysis would manifest with noticeable facial asymmetry or weakness. However, because the manifestations of a brain abscess are often insidious, it can easily be the so-called 'silent complication' among the listed.