Given below are two statements: 

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

1. Assertion and reason both are correct statements and reason explains the assertion.
2. Both assertion and reason are wrong statements.
3. Assertion is the correct statement and reason is the wrong statement.
4. Assertion is the wrong statement and reason 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.