Which of the following is a unit vector ?

Which of the followingis a unit vector ?

Which of the followingis a unit vector ?

Two vectors vecP and vecQ are inclined to each other at angle theta . Which of the following is the unit vector perpendicular to vecP and vecQ ?

Two vectors vecP and vecQ are inclined to each other at angle theta . Which of the following is the unit vector perpendicular to vecP and vecQ ?

Two vectors vecP and vecQ are inclined to each other at angle theta . Which of the following is the unit vector perpendicular to vecP and vecQ ?

Which of the following is the unit vector perpendicular to vecA and vecB

Which of the following is not a unit vector ?

Which of the following is the unit vector perpendicular to vec(A) and vec(B) ?

Which of the following is the unit vector perpendicular to vec(A) and vec(B) ?