NEET Physics Magnetism and Matter Questions Solved

Two short magnets with their axes horizontal  to the magnetic meridian are placed with their centres 40 cm east and 50 cm west of magnetic needle. If the needle remains undeflected, the ratio of their magnetic moments  is

(a) 4:5

(b) 16:25

(c) 64:125

(D) 2:$\sqrt{5}$