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Acid- catalyzed reaction of D- glucose w...

Acid- catalyzed reaction of D- glucose with benzaldehyde produces the `4,6-O0` benzylidene derivative. Reduction with `NaBH_(4)` followed by excess `HIO_(4)` cleavage and acid hydrolysis yields a `C_(4)H_(8)O_(4)` tetrose and benzaldehyde . What is the configuration of this tetrose ?

A

`2S,3S`

B

`2R,3S`

C

`2R,3R`

D

`2S,3R`

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