CBSE | The War and its aftermaths

Scientists point out ("of sunspot activity")/(P) ("that it is an aftermath that ")/(Q) ("has now reached its peak")/(R) ("of the eleven-year cycle")/(S)

The theory that dinosaurs were driven to extinction by the aftermath of a large asteroid impact on Earth was given by______.

Who is the author of the book 'Crossed Swords: Pakistan, Its Army and the War Within'?