The chief constituents of biogas are: ((MCAER 2014))

✅Explanation: Carotenoids are a group of pigments that give fruits and vegetables their vibrant colors. Capsanthin, a specific type of carotenoid, is responsible for the red color of chili peppers.

📌 Other Options Explanations:
-Option A: Anthocyanins are pigments that give flowers and fruits their blue, purple, and red colors.
-Option B: Capsaicin is the compound that gives chili peppers their spicy flavor.
-Option D: Chlorophyll is the green pigment found in plants.