Pehchaan: The Face of Truth

Swati Azad and Mridula are two inseparable friends in college. Both do well in their studies, successfully complete college and get married to Ajay Lal and Milind Khanna respectively. Four years later, Prasad Saxena, another former collegian meets with a pregnant Mridula and informs her that Swati has committed suicide as she had lost her sanity. He tells her about the background of Swati's death and his suspicions that she was actually killed by the Lal family. (imdb)