Three concurrent co-planer force `1N` , `2N` and `3N` acting along different directions on a body
A. can keep the body in equilibrium if 2N and 3N act at right angle
B. can keep the body in equilibrium if 1N and 2N act at right angle
C. cannot keep the body in equilibium
D. can keep the body in equilibrium if 1N and 3N act at an acute angle
