Three cyclic structures of monosaccharides are given below which of these are anomers.
(i) I and II
(ii) II and III
(iii) I and III
(iv) III is anomer of I and II
The answer is the option (i). Anomers are the compounds are the cyclic structures of monosaccharides which differ at the carbon-1 in their structure. So, option (i) I and II is the right answer.