Identify the correct jurisprudential definition of the 'doctrine of proportionality' as utilized by Indian courts:
1. It mandates that if one part of a statute is unconstitutional, only that specific part is severed and voided.
2. It requires an equitable and reasonable equilibrium between the state's desired legislative objective and the restrictive measures employed.
3. It asserts that conflicting statutes must be interpreted harmoniously to ensure neither is rendered entirely redundant.