Guru Purnima special event

In a row of girls, Purnima is eighth from the right and Bhavana is twelfth from the left. When Purnima and Bhavana interchange positions, Bhavana becomes twenty-first from the left. Which of the following will be Purnima's new position from the right? 1) 8th 2) 17th 3) 21st 4) Data inadequate 5) None of these

Assertion : Theory of special creation attributes the origin of life to a vitalistic event. Reason :According to this theory, the God is creator of life.

Madhavi and Shalini are good in Dramatics and Computer Science. Anjana and Madhavi are good in Computer Science and Physics. Anjana, Purnima and Nirmala are good in Physics and History. Nirmala and Anjana are good in Physics and Maths. Purnima and Shalini are good in History and Dramatics. Who is good in Physics, History and Dramatics ?