| List - I (Form of advertising) | List - II (Content and Objective) | ||
| (A) | Public Service Advertising | (I) | Personal form of advertising |
| (B) | Direct Mail | (II) | Competitive market |
| (C) | Informational Advertising | (III) | Social awareness |
| (D) | Comparative Advertising | (IV) | New product is introduced |
Fill in the blank with the correct option.
The teacher believed that the student’s sudden lack of interest in class was an ..........., as he had always been enthusiastic and attentive.
What comes next in the series?
\(2, 6, 12, 20, 30, \ ?\)