I thank Shunmugam sir, Subbulakshmi madam and the faculties of Vetrii IAS Study Circle, who have supported me in my whole preparation for Civil Services Examination. My personal interactive session with Nandhakumar Sir for History particularly World History and International Relations were exceptional. The answer writing sessions for the mains examination and the personal feedback given for the answers were very helpful. The quality of questions covered all relevant topics and the current significant issues. This helped in achieving high scores in the mains examination. I wish all the best to future aspirants.