Correct option is A
The correct antonym of the given word is
hindrance.
Permission: The action of officially allowing someone to do something. (Hindi meaning: अनुमति)
Example: You need permission to enter the building.
Hindrance: Something that obstructs or delays progress or action. (Hindi meaning: बाधा)
Example: His lack of experience was a hindrance to his career.
Synonyms: approval, consent, license.
Antonyms: obstacle, hindrance, barrier.
Meanings of other options:
· (b)
Authorisation: Official permission (अनुमोदन)
· (c)
Liberty: Freedom (स्वतंत्रता)
· (d)
Consent: Agreement (सहमति)