Choose statements that are true about Proximate analysis: i. Official method for fat analysis is Soxhlet method. ii. Official method for moisture analysis is oven drying method. iii. Official method for protein analysis is Kjeldahl method. iv. Carbohydrate analysis is determined by difference. a. All of the above b. i, ii, and iv c. i, ii, and iii d. ii, iii, and iv

ii. Official method for moisture analysis is oven drying method. iv. Carbohydrate analysis is determined by difference.

Proximate Analysis

• Moisture Analysis：Official method for moisture analysis is indeed the oven drying method, which is a widely accepted technique for determining the moisture content in solid biofuels.3
• Carbohydrate Analysis：Carbohydrate content is often determined by difference, after the other components such as moisture, ash, protein, and fat have been quantified. This approach is based on the total mass balance of the sample.2

Additional Details

• Protein Analysis：While the Kjeldahl method is a well-known technique for protein analysis, the statement does not specify it as the official method for protein analysis in the context of proximate analysis. Therefore, it is not included in the correct statements.
• Fat Analysis：The Soxhlet method is a recognized method for fat extraction, but again, it is not specified as the official method for fat analysis in the context of proximate analysis. Thus, it is not included in the correct statements.