The term anomers of glucose refers to

• A
  Isomers of glucose that differ in configurations at carbons one and four ($C-1$ and $C-4$)
• B
  $A$ mixture of $(D)$-glucose and $(L)$-glucose
• C
  Enantiomers of glucose
• D
  Isomers of glucose that differ in configuration at carbon one $(C-1)$