A disaccharide reduces Fehling solution, gives only D-glucose on hydrolysis, is hydrolysed by an enzyme specific for alpha-glycosides and has a C-1 to C-4 linkage. It is

Acellobiose
Blactose
Csucrose
Dmaltose

Answer: D

Only glucose on hydrolysis excludes lactose and sucrose. The alpha-specific enzyme excludes cellobiose (beta link), leaving maltose (reducing, alpha-1,4).

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