Given below are two statements: 

Assertion (A): D (+) - Glucose is dextrorotatory in nature.
Reason (R): D represents its dextrorotatory nature.

 

1. (A) and (R) both are correct statements and (R) explains the (A).
2. Both (A) and (R) ​​​​​​​are wrong statements.
3. (A) is the correct statement and (R) ​​​​​​​is the wrong statement.
4. (A) is the wrong statement and (R) ​​​​​​​is the correct statement.

Hint: (+) sign for dextrorotatory, D or L represent relative configuration of penultimate carbon with respect to glyceraldehyde

 The assertion is correct but the reason is wrong statement D (+) glucose is dextrorotatory because it rotates the plane-polarized light in the right direction.

Here, D represents the relative configuration of glucose with respect to glyceraldehyde.