I. Formation of A has proceeded with racemisation. II. Formation of B has proceeded with inversion. Select the correct statement. Select the correct statement.

Step-by-step solution

S _ N 1 reaction proceed through formation of carbocation which can form a pair of enantiomers. Thus, recemisation takes place (statement I). S _ N 2 reaction takes place forming pantavalent intermediate which loses Cl ⁻ giving inverted alcohol. (Statement II ) Hence, statements I and II both are correct.