Final answer:
The correct method for analyzing large proteins and peptides is HPLC, not GC. GC is usually carried out at or around room temperature.
Step-by-step explanation:
The correct statement is B. Large proteins and peptides can be analyzed by HPLC. Gas chromatography (GC) is typically not used for large molecules like proteins and peptides because they cannot be effectively vaporized and separated by GC. On the other hand, high-performance liquid chromatography (HPLC) is commonly used for the analysis of large proteins and peptides.
Regarding the temperature, the correct statement is C. GC is usually carried out at (or around) room temperature. HPLC, on the other hand, typically involves the use of a column at elevated temperatures to enhance separation.