Q581. Choose the sentence with proper pronoun usage.

Q582. Which communication barrier involves filtering information to suit one's own beliefs or expectations?

Q583. Which abbreviation indicates that an additional document is attached to the business letter?

Q584. For a matrix \(A, \: B\) and identity matrix \(I\), if a matrix \(AB=I=BA\) then?

Q585. Any vector in an arbitrary direction can be replaced by two or three vectors