Choose or find odd number - 2468 , 2648 , 4826 , 6482

A. 2468

Choose or find odd word - Graphite , Pearl , Diamond , Coal

B. PEARL

Choose or find odd letter group - VYXW , PSRQ , CGEF , JMLK

C. CGEF

Choose or find odd word - Wood , Cork , Stone , Paper

C. STONE

Choose or find odd number - 325 , 236 , 178 , 639 , 538

B. 236