What are the three scenarios mentioned for determining the appropriate High Court in case of detentions?
The three scenarios mentioned for determining the appropriate High Court in case of detentions are:

1. In the case of the detention of a person in pursuance of an order of detention made by the Government of India or an officer or authority subordinate to that Government, the High Court for the Union territory of Delhi.
2. In the case of the detention of a person in pursuance of an order of detention made by the Government of any State (other than a Union territory), the High Court for that State.
3. In the case of the detention of a person in pursuance of an order of detention made by the administrator of a Union territory or an officer or authority subordinate to such administrator, the High Court as may be specified by or under any law made by Parliament in this behalf.