For two vectors A and B which lie in a plane. Which of the following statement is correct?
Options:
(a) If magnitude of A and B vector is 3 and 4 and they add upto give vector having magnitude of 5, then they must be perpendicular vector.
(b) If they add up to give more than 5, then they must be inclined at obtuse angle.
(c) If they add upto give less than 5, then they must be inclined at acute angle.
(d) None of the above