When a part of a statute is declared unconstitutional, the offending provisions can be separated from the constitutional part. This doctrine is called:

Correct option is B

The Doctrine of Severability states that if a particular provision of a law is unconstitutional, it can be removed while retaining the rest of the statute, provided the remaining provisions can function independently. This principle was upheld in A.K. Gopalan v. State of Madras (1950).