In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?_ABBI_R_B_IT_AB_IT
In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ? _ABBI_R_B_IT_AB_IT 1). RBATRB 2). RATBRB 3). RTBARB 4). RTABRB