With reference to the Indian and British Parliamentary System, consider the following statements:
1. Both the Indian and British Parliamentary systems are based on Doctrine of the Sovereignty of Parliament.
2. In both the systems, the Prime Minister must be from the lower house of Parliament.
3. Britain has the system of legal responsibility of the ministers, while India has no such system.
4. Both the systems have an elected Head of the State.
How many of the above given statements are correct?