Carbohydrates are type of food that are used by living organisms to generate energy. They are classified into monosaccharides, disaccharides and polysaccharides. Monosaccharides are the simplest form of carbohydrates for exapmple glucose, fructose e.t.c. Disaccharides are sugars derived from combining two monosaccharides while polysacchrides are complex chains of many monosaccharides joined together such as starch, cellulose among others. Monosaccharides are joined/linked together by a process called condensation, however,they can also be separated by a process called hydrolysis. Therefore in this case, the correct answer is D (condensation).
