From the given options, select the OPPOSITE in meaning to the given word:

"Conscientious"

Irresponsible

From the given options, the opposite in meaning to the word "Conscientious" is:

Option 3: Irresponsible

Explanation: "Conscientious" describes someone who is diligent, careful, and responsible in their work or duties. "Irresponsible" means lacking a sense of responsibility or not taking one's duties seriously, making it the opposite of conscientious. The other options do not have the opposite meaning:

• Option 1: Mutual means shared or common between two or more parties, unrelated to conscientiousness.
• Option 2: Scrupulous means being meticulous and diligent, which is synonymous with conscientious.
• Option 4: Meticulous means showing great attention to detail, which is similar in meaning to conscientious.