According to international nutritional standards (WHO/FAO and ISO 26642), foods are officially classified based on their Glycemic Index (GI) values (relative to pure glucose $= 100$) into:

• Low Glycemic Index: GI value $\le 55$
• Medium Glycemic Index: GI value between $56$ and $69$
• High Glycemic Index: GI value $\ge 70$

L-Carnitine ($eta$-hydroxy-$\gamma$-trimethylammonium butyrate) is an amino acid derivative concentrated in skeletal and cardiac muscle of red meat. Physiologically, it functions as the obligate carrier shuttle that transports activated long-chain fatty acids across the inner mitochondrial membrane for $eta$-oxidation. In nutraceutical and functional food formulations, L-carnitine is widely used as an anti-obesity ingredient and weight-management supplement to enhance lipid metabolism and fat burning.

Option analysis:

• Anti clotting agent: Blood thinners/anticoagulants like heparin, not carnitine.
• Anti obesity ingredient: Correct, commercially marketed for fat burning, exercise endurance, and weight loss.
• Coloring ingredient: Pigments like myoglobin, not carnitine.
• Anti caking agent: Flow agents like calcium silicate, unrelated to carnitine.

Goyang is a unique traditional fermented vegetable product prepared by the indigenous Rai and Limbu communities of Sikkim and Nepal. It is made from wild Cardamine macrophylla (locally called 'magori') leaves harvested from high-altitude Himalayan forests, withered, tightly pressed into bamboo baskets or pits, and anaerobically fermented by lactic acid bacteria (Lactobacillus and Pediococcus) to serve as a sour soup base.

Option analysis:

• Tamil Nadu: Known for fermented rice foods like koozh.
• Rajasthan: Known for dried ker-sangri and rabadi.
• Sikkim and Nepal: Correct, traditional habitat and culinary culture of goyang preparation.
• Kerala: Known for fermented coconut and rice batters (appam).