why you want to join ib acio

Correct option is A

For IB ACIO preparation, use trusted and subject-wise books:

General Awareness: India Yearbook, Manorama Yearbook, Pratiyogita Darpan

Quantitative Aptitude: RS Aggarwal, Arun Sharma (DI), Pearson Quant

Reasoning: A Modern Approach to Verbal & Non-Verbal Reasoning by RS Aggarwal

English (Tier II): 151 Essays for IAS/PCS (Disha), Wren & Martin for grammar, and comprehension guides
These books, along with daily current affairs revision and mock test practice, provide complete coverage for both Tier-I and Tier-II."