ONGC GT Exam Books 2019|Best Books for Preparation of ONGC Graduate Trainee Exam

ONGC GT Exam Books 2019|Best Books for Preparation of ONGC Graduate Trainee Exam The Oil and Natural Gas Corporation (ONGC) conducts the recruitment exam for the post of the Graduate Trainees Every year. The candidates apply for the post need to study hard with proper study material to crack ONGC GT written exam.In ...