Correct Answer: LBELRDR

Solution : Given:
G_AREGL_R_G_C_EGL_ _E
To fill the series we have to divide the series– G_ARE/GL_R_/G_C_E/GL_ _E

Let's check each option –
First option: KBELRDR; G K ARE/GL B R E /G L C R E/GL DR E (No repeated pattern has been found.)
Second option: LBELRDR; G L ARE/GL B R E /G L C R E/GL DR E (One is added in the place value of the third letter and other letters are repeated in the series.)
Third option : LAELRER; G L ARE/GL A R E /G L C R E/GL ER E (No repeated pattern has been found.)
Fourth option: KBELRER; G K ARE/GL B R E /G L C R E/GL ER E (No repeated pattern has been found.)

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