Select the option that can be used as a one-word substitute for the highlighted words.
Whatever topic I discussed with the sage, it seemed that he knew everything.

Correct option is A

The correct one-word substitute for the highlighted phrase "knew everything" is "was omniscient."
Omniscient: This term describes someone who has complete or unlimited knowledge, awareness, or understanding; perceiving all things. ( सर्वज्ञ)
Example: The characters in the novel turn to the omniscient narrator to reveal their secrets.
Meanings of the given other options:
· Abnormal: Not normal, standard, or typical.
· Excellent: Extremely good; outstanding.
· Psychologist: A person skilled in psychology.