Final answer:
The film by Deepa Mehta that used "Tryst of Destiny" is 'Earth'. It explores the period of Indian partition and should not be confused with Salman Rushdie's novel 'Midnight's Children', which also deals with India's independence.
Step-by-step explanation:
The 1998 film by Deepa Mehta that used "Tryst of Destiny" is b) "Earth". This film is part of Deepa Mehta's Elements trilogy and is set during the tumultuous period of the end of British occupation, leading to the partition of India and the creation of Pakistan. This historical context makes "Earth" a significant cinematic work as it explores the impact of partition on the lives of its characters. It is important not to confuse "Earth" with Salman Rushdie's "Midnight's Children", which is a novel that encompasses approximately thirty years of the protagonist Saleem's life, including flashbacks to before he was born, and also deals with the birth of independent India.