The advertising medium that has the advantage of high selectivity, immediacy and low cost is (A) Newspaper (B) Direct Mail (C) Radio (D) Online Correct Ans: (D) Explanation: Online advertising stands out due to its high selectivity, immediacy, and cost-effectiveness. Unlike traditional media, digital platforms allow advertisers to target specific audiences based on demographics, interests, and online behavior. This precise targeting ensures that messages reach the right people, maximizing impact. Another key advantage is immediacy. Advertisers can launch, modify, or stop campaigns instantly. This flexibility is crucial in responding to market trends, consumer preferences, or real-time events. Businesses can track engagement, analyze data, and adjust strategies to improve performance. Cost efficiency also makes online advertising attractive. Compared to television, radio, or print media, digital ads require lower investments. Pay-per-click models, social media promotions, and email marketing allow businesses to control spending. Even small enterprises can compete with larger brands by using budget-friendly digital strategies. Additionally, online advertising enables interactive engagement. Users can click on ads, visit websites, watch videos, or share content. This direct interaction enhances consumer involvement and boosts brand awareness. Despite its benefits, online advertising faces challenges such as ad fatigue and privacy concerns. However, with proper targeting and creative content, businesses can effectively reach their audience. In conclusion, online advertising’s high selectivity, instant reach, and affordability make it a dominant force in modern marketing.