उत्तर : 3. "Outdated"
व्याख्या :

• Obsolete means no longer in use or outdated.
• Modern (a) means current, up-to-date.
• Current (b) means happening or existing now.
• Trendy (d) means fashionable or stylish.

Therefore, the correct answer is c) Outdated, as it best matches the meaning of "Obsolete."