The characteristics of online and social media marketing are: (1) Personal (2) Rich (3) Timely (4)…

According to Kotler and Keller's analysis of marketing communication channels, online and social media marketing are characterized by three distinctive properties: they are (2) 'Rich' (conveying text, audio, and video information), (4) 'Interactive' (allowing two-way dialogue), and (5) 'Up to date' (messages can be prepared and diffused instantaneously). Thus, '2, 4 and 5 only' is correct.