Explanation

(c)
(i) Ketohexose It is carbohydrate having 6C atoms and a ketonic group.
(ii) Disaccharide It is carbohydrate which on hydrolysis gives 2 molecules of monosaccharides.
(iii) Polysaccharides These carbohydrates give more than two molecules of monosaccharides on hydrolysis.
(iv) Pentose It is a 5 carbon atoms monosaccharide e.g., Ribose $\left( C_{5}H_{10}O_{5} \right).$