Step 1: Understanding the Concept:
Proximate analysis is used to determine feed composition.
NFE (Nitrogen-Free Extract) is a calculated value.
Step 2: Key Formula or Approach:
No specific formula.
Need to understand proximate analysis.
Step 3: Detailed Explanation:
NFE represents the soluble carbohydrate fraction, not structural (A is incorrect).
NFE determination leads to underestimation of crude fibre (B is correct).
NFE leads to overestimation of starch and sugar (C is correct).
NFE and CF do not represent total carbohydrates (D is incorrect).
Thus, B and C are correct.
Step 4: Final Answer:
B and C are correct.
Hence, the correct option is (D).