The number of chiral carbons in beta - D(+) - glucose is:

The correct answer is 5,option A i.e. in -D(+) -glucose, 5 chiral carbon atoms are present which can be understood with the help of given structure.

The chemical formula of D(+) -glucose is C₆H₁₂O₆. As it can be viewed, barring the C atom of -CH₂OH group, which has 2 similar substituents (2 H), all other C atoms have 4 different substituents which is given since they are asymmetrical. Hence, those 5 asymmetrical C atoms are stereotypically chiral.

Hence, the correct choice is option A.