Consider points P=(3, 4) and Q = (2,5). Find the unit vector which has the opposite direction of the vector of PQ.
A. (-1,1)
B. ( -1/√2, 1/√2)
C. (1,-1)
D. ( 1/√2, -1/√2)
E. (3/5 - 2/√20, 4/5 - 5/√29