IB ACIO Syllabus Complete Guidance - Assistant Central Intelligence Officer (ACIO) By Chetan Mna. In this lesson, Chetan discusses about the IB (Intelligence Bureau) ACIO (Assistant Central Intelligence Officer) Examination Syllabus. Complete syllabus for ACIO -II (Intelligence Bureau ). This course will cover all important information of ACIO from examination procedure to salary and growth. This course is narrated in Hindi by Chetan Mna. Must watch for all! You can find the entire course here: