Aldohexose reacts with acetone in `H_(2)SO_(4)` to form cyclic ketal. Necessary condition to form cyclic ketal is that two `OH` groups must be in cis `(syn)` position. Compound `(D)` reacts with `2 mol` fo acetone to form cyclic diketal, as shown below.
Which statement`(s) is//are` correct about `(E)`?
A. Both cyclic ketals have five-membered ring.
B. Both cyclic ketals have six-membered ring.
C. Cyclic ketals formed between `C-2` and `C-3` have five-membered ring.
D. Cyclic ketals formed between `C-4` and `C-6` have six-membered ring.
