Correct Answer: DMBFDGMF

Solution : Given:
_ _BFGDM _ _G_ MBF_D_B_G

To fill the series we have to divide the series – _ _ BFG / DM _ _ G / _ MBF _ / D _ B _ G
Let's check each option –
First option: DMFBDGMF ; DM BFG / DM FB G / D MBF G / D M B F G (No repeated pattern has been found.)
Second option: DMBFDGMF ; DM BFG / DM BF G / D MBF G / D M B F G (DMBFG is repeated in the series.)
Third option: DFBMDGMF ; DF BFG / DM BM G / D MBF G / D M B F G (No repeated pattern has been found.)
Fourth option: DMBFGDFM ; DM BFG / DM BF G / G MBF D / D F B M G (No repeated pattern has been found.)

So, the series becomes→DMBFGDMBFGDMBFGDMBFG. Hence, the second option is correct.