context: Its a love story with a twist set in Bengal in pre independent India (early 1940); the time when young Indian students were competing equally with British 'goras' in all fields whether it be education or sports. This was the time when barefooted Bengali football team defeated the booted British team to win the national football shield; this was the time when the ambitious and educated Calcutta students were extending their prowess in all fields of education with the British - be it law or medicine. It is in this time of rising nationalistic sentiments (1942 was when Gandhiji started the non violent Quit India movement) that Krishnendu (Uttam Kumar), a bright, young, athletic and Hindu Bengali youth falls in love with an equally talented and attractive but Christian Rina Brown (Suchitra Sen). Both of them were students in the National Medical College and they come close during their interaction in multitude of sports and cultural events. However their marriage is not on the cards due to the difference in religion (particularly opposed by Krishnendu's dad, a staunch, conservative Hindu) and they move each other ways only to clash unexpectedly again, later in life. Most of the movie is shown in flashback mode; Krishnendu pondering over the past upon his suuden unexpected interaction with a drunk and passed out Rina in a military hospital in rural Bengal.
question: Who opposes the marriage?
answer: particularly opposed by Krishnendu's dad, a staunch, conservative Hindu