In which film did two different actresses play one character (and not as two different ages, i.e. the child and the adult), as opposed to the more usual convention of one actress playing two different characters?
This is one of the actresses.
Banno is our winner! The film is Yeh Vaada Raha (1982) starring Rishi Kapoor and Poonam Dhillon as his beloved Sunita. A tragic accident destroys her face and provides his mother with an excuse to tear them apart (she tells him that Sunita has died). Enter my beloved Shammi, a surgeon:
After 8-10 operations Sunita is a new woman (literally), now played by Tina Munim. The film’s plot is lifted from a Danielle Steel book (I forget which one).
I love this film, it’s one of those cathartic tearjerkers that I find irresistible.
(Note to subtitlers: DO NOT subtitle a film in ALL CAPS, it makes viewers feel like you are shouting at them.)