The correct answer to the question is 3. Cry, The Peacock. Here's why:
In Cry, The Peacock, the central character, Maya, is mentally disturbed and experiences emotional turmoil throughout the novel. Maya’s obsessive love for her husband, Gautama, leads her to a tragic end. In a moment of intense emotional and psychological distress, she kills her husband by pushing him off a balcony. Maya's mental instability and her inability to cope with the trauma of her life, along with her overwhelming fears, contribute to her tragic action.
Let's look at the other novels briefly:
Voices in the City: The novel revolves around the complex lives of three siblings, their emotional struggles, and their search for meaning in a city filled with despair. It does not feature a plot about a wife killing her husband.
In Custody: This novel deals with the life of a middle-aged, disillusioned Urdu professor, Deven, and his experiences with the famous poet Nur. It doesn’t have a plot about a wife killing her husband.
Baumgartner’s Bombay: This novel is about the life of a German-Jewish man, Baumgartner, in post-World War II India. The narrative explores themes of loneliness, identity, and survival, but it does not involve a wife killing her husband.
Thus, the answer is 3. Cry, The Peacock, because of Maya’s mental breakdown and her tragic decision to kill her husband.