Which of the following is true with respect to wildlife sanctuaries?

i. Boundaries of wildlife sanctuaries are fixed.

ii. Human interference is prohibited.

iii. Controlled human activities are permitted.

In a wildlife sanctuary, the boundaries are flexible, and under specific rules and regulations, managed human activities like grazing, ecotourism and research etc. are permitted.

A sanctuary's primary goal is to safeguard the environment and the creatures that live there while allowing for only moderate human activities.