Correct option is D
The correct antonym of the word "Diffident" is "Confident."
Diffident means lacking self-confidence, being shy or hesitant in acting or speaking.
Hindi Meaning: आत्मविश्वास की कमी, संकोची।
Synonyms: Timid, Shy, Reserved, Hesitant.
Antonyms: Confident, Bold, Assertive, Assured.
Anxious means feeling worry or unease about something.
Example: She was anxious about the upcoming exam.
Timid means showing a lack of courage or confidence.
Example: The child was too timid to ask for help.
Certain means sure or confident about something.
Example: She was certain of her decision to take the job.
Confident means having strong belief in one's abilities or self.
Example: He was confident during the interview and answered all questions fluently.