Select the most appropriate ANTONYM of the given word.

RESPONSIBLE

irresponsible

The correct answer is option 4. irresponsible.

"Responsible" typically means having an obligation to do something or being accountable for one's actions, indicating reliability, dependability, or trustworthiness.

The antonym we're looking for should describe someone who lacks accountability or reliability.

"Irresponsible" fits this description perfectly. It means lacking a sense of responsibility or failing to fulfill obligations, contrasting with "responsible," which implies being accountable or dependable.

Therefore, "irresponsible" is the appropriate antonym for "responsible" because it represents the opposite characteristic—lacking accountability or reliability.