 My name is Muthu S. I did my graduation in Alapakology of Technology in Industrial Biotechnology. This is my first main in Indian Forest Service and my optionals were Forestry and Geology. The main reason why I took these optionals because that the source materials as well as the guidance is easily available for both these optionals and for clearing this exam choosing optionals is very very important as well as when the forestry was taken by Karthikeyan sir who had handled it very very well and he had dealt into how to present the very small amount or less amount of content in different ways because we have a short span of time to prepare like hardly we have 45 days and we have to prepare two options so it's not going to help that we are going to learn a lot of things we have to learn less but use it in different ways which Karthikeyan sir had guided very well as well as for geology we had different staffs coming and taking of which Huzain sir's class were very very good further towards the cracking this exam we need to be good in English where we can solve the last five years papers which was very very essential to score all the grammar part right if we score good in grammar basically our marks will also be better in the overall paper next is the GS part which mostly gets covered in our civil service preparation but science and tech has higher focus in forest service so I had read few compilations which had directly correlated with the questions for instance the chandra and question or neural networks had come from the compilations so I would recommend studying a compilation for science and tech at least because we get almost like 100 marks in the total 300 marks this was basically my strategy of preparing for Indian Forest Service and Shankar Institute's guidance and help was very important for us thank you