Graphite is soft solid lubricant extreamly to melt. The reason for this anomalous behaviour is that graphite:
A. has carbon stoms anrranged in large plaens of ringes of strongly boun caraon atoms with weak inteplanar bonda
B. is a non -cystallline substane
C. is an allotropic form of carbon
D. has molecules of variable molecular masses like polymers