Compound A is a D-aldopentose that on oxidation with dilute `NHO_(3)` give optically active aldaric acid B. On Kiliani-Fisher chain extension shown below. A is converted into C and D-glucose
`underset(("An aldopentose"))(A) underset(H_(2)O)overset(HCN)(rarr) underset(BaSO_(4))overset(H_(3)//Pd)(rarr) C+D-"Glucose"`
Answer the following three questions based on the above information.
Which of the following represents the alpha `(alpha)` anomer of C ?
A.
B.
C.
D.
