When will the fourth argument to open() useful?

A. When the second argument names a retired window

B. When the first argument names an existing window

C. When the second argument names an existing window

D. When the first argument names a retired window

Answer: Option C

Solution(By Examveda Team)

The fourth argument to open() is useful only when the second argument names an existing window. This fourth argument is a boolean value that indicates whether the URL specified as the first argument should replace the current entry in the window’s browsing history (true) or create a new entry in the window’s browsing history (false). Omitting this argument is the same as passing false.