Two particles of masses 4 kg and 8 kg are separated by a distance of 12 m. If they start moving towards each other under the influence of a mutual force of attraction, then the two particles will meet each other at a distance of:
(A) 6 m from 8 kg mass
(B) 2 m from 8 kg mass
(C) 4 m from 8 kg mass
(D) 8 m from 8 kg mass