strongMumbai/strong: Priyanka Chopra is said to be going through tremendous turmoil and stress because of her father's frail health. It was evident at a recent shoot when the actress faced the camera with Sanjay Dutt for Apoorva Lakhia's emZanjeer/em. Priyanka kept forgetting her lines, says a source. It was not like Priyanka at all . She is never known to forget a single line. But there she was standing in front of Mr Dutt, faltering and fumbling over her lines repeatedly, the source said. [caption id=attachment_568905 align=alignleft width=380