sir need guide line on to prepare civil service exams, better instiute in delhi and books and one more that about subject to choice

Hi Manish, To prepare well for the Civil service, you would require high levels of concentration with good academic record and knowledge about the current happenings. There are many institutes in India offering coaching for the Civil Services and to know about these, you may refer to the following

Hi Manish. To prepare for IAS you have to take preliminary and main exams. In prelimnary you need to take a subject of your interest and prepare for general knowledge. In Mains the subject you have taken and one more subject as optional too. You should be prepared for the same. In Delhi Rau's IAS ac