The native servants she had been used to in India were not in the least like this. They were obsequious and servile and did not presume to talk to their masters as if they were equals.
The definition of obsequious is "obedient."
Which context clue that tells you this?
A. Obsequious is an adjective describing how the servants treated their masters.
Because, the sentence mentions that they were obsequious and servile, which would mean that they are synonyms. If they were antonyms, then the setence would say "They were obsequious but not servile."