The correct answer is Option 1 - "Food Nutrition and Environmental Security". This theme was chosen for the Indian Science Congress, 2001 as the focus of academic and scientific discussions were primarily oriented towards these areas. The aim was to promote advancements in technologies and methodologies that can enhance food production, improve nutritional quality and enhance environmental security.

Option 2 - "Arrest declining interest in pure sciences" is not correct. Though the importance of pure sciences and keeping interest alive in them is a focus area of such Congresses, it was not the theme of the 2001 event.

Option 3 - "Make India energy self-sufficient" is also incorrect. Although energy self-sufficiency is a critical goal for India, it was not the central theme of the Indian Science Congress in 2001.

Option 4 - "Make India IT Superpower" is not correct either. While Information Technology is a major sector in India, making India an IT superpower was not the theme of this Congress. Instead, the focus was on food, nutrition, and environmental security.