The normal group boundaries gate obliterated in:

Group boundaries refer to the lines that define who is a part of a group and who is not.

Key Points

• The normal group boundaries are often obliterated in a Campaign.
• Campaigns, especially those focused on social or community issues, are designed to reach a wide audience and encourage collective action.
• The goal is to break down the usual barriers between different groups and bring together people who might not normally interact, thus erasing or minimizing the usual boundaries for the sake of a common objective.

Hint

• Method demonstration: This involves a step-by-step explanation and demonstration of a particular method or process, often in a structured setting. 
• Farm and home visits: These visits are personal, one-on-one interactions between an educator or community worker and the family or farmer. 
• Office calls: Office calls are formal interactions typically involving professional or administrative discussions. 

Hence, the correct answer is 'Campaign'.