Antonym of the word ‘restive’ is-

• Restive means being unable to remain still or quiet, often due to impatience or restlessness.

• The opposite of being restless or impatient is being patient, which means having the ability to wait calmly without getting agitated or anxious.

• The other options do not directly oppose the meaning of "restive":

- Rigorous refers to something strict or thorough.
- Deceptive means misleading or giving a false impression.
- Cautious means being careful to avoid danger or mistakes.
- Therefore, the correct antonym is patient (ক).