One major theme in Mahesh Dattani's play Tara is that of guilt. In this play, two conjoined twins are separated so that the male twin, Chandan, can live a normal life, but the female twin, Tara, is severely disadvantaged. As a result, Tara's life is difficult and unpleasant from the beginning, and eventually, complications cause her death.
Although the male twin, Chandan, obviously had no part in the decisions made by the twins' doctor and mother, he feels an enormous amount of guilt for Tara's struggles and for her death. This may be partially "survivor's guilt," or the feeling that he got away with no repercussions, while his sister suffered and died.
Another character that feels guilt is Bharati, the mother of the twins. She knowingly determined the results of the surgery in accordance with cultural preferences that put male life on a higher plane than female life. She has to live knowing that she has indirectly caused the death of her daughter for the sake of her son.