*Suggestive order of services for filling Prelims form* 1. Indian Administrative Service (IAS) 2. Indian Foreign Service (IFS) 3. Indian Police Service (IPS) 4. Indian Revenue Service (Income Tax) 5. Indian Revenue Service (Customs & Indirect Taxes) 6. Indian Corporate Law Service (ICLS) 7. Indian Audit and Accounts Service (IA&AS) 8. Delhi, Andaman and Nicobar Islands, Lakshadweep, Daman & Diu, and Dadra & Nagar Haveli Civil Service (DANICS) 9. Delhi, Andaman and Nicobar Islands, Lakshadweep, Daman & Diu, and Dadra & Nagar Haveli Police Service (DANIPS) 10. Pondicherry Civil Service (PONDICS) 11. Pondicherry Police Service (PONDIPS) 12. Indian Railway Management Service (IRMS) 13. Indian Civil Accounts Service (ICAS) 14. Indian Defence Accounts Service (IDAS) 15. Indian Defence Estates Service (IDES) 16. Indian Information Service (IIS) 17. Indian Postal Service (IPoS) 18. Indian Railway Personnel Service (IRPS) 19. Indian Railway Accounts Service (IRAS) 20. Indian P&T Accounts and Finance Service (IP&TAFS) 21. Indian Railway Protection Force Service (RPF) 22. Indian Trade Service (Grade III) 23. Armed Forces Headquarters Civil Service (Section Officer’s Grade) Note: This is only a suggestive order of preference. The final choice may vary due to individual preference of aspirants.