Option (A): True
The NGT Act 2010 is indeed grounded in Article 21 of the Indian Constitution, which guarantees the right to life, interpreted by the Supreme Court to include the right to a clean and healthy environment. Hence, the NGT draws constitutional support from Article 21.
Option (B): True
A retired Supreme Court Judge or a Chief Justice of a High Court is eligible to be appointed as the Chairperson of the NGT, as per Section 5 of the NGT Act 2010. Hence, this statement is correct.
Option (C): False
There is no “NGT Act 2017.” The correct act is the NGT Act 2010. Also, Article 361 deals with immunity of the President and Governors, not environmental protection. Therefore, this statement is incorrect.
Option (D): False
The NGT aims to dispose of cases within 6 months, not 45 days. So this statement is incorrect.
Final Answer: (A), (B)