Step 1: Understanding the Concept:
Parliament has legislative power to define the structure and jurisdiction of various judicial bodies.
Step 2: Detailed Explanation:
- (A) is correct: Under Art 230, Parliament can extend or exclude HC jurisdiction to/from UTs.
- (B) is correct: Under Art 231, Parliament can establish a common High Court.
- (C) is correct: Under Art 241, Parliament can create a High Court for a UT.
- (D) is correct: Under Art 323A/B, Parliament can establish tribunals.
- (E) is incorrect: Judges of High Courts are appointed by the President (Art 217), not "by law" by Parliament.
Step 3: Final Answer:
Parliament can do A, B, C, and D.