Hey Ritesh!

To start with, you haven't mentioned the examination in which you want to get good marks, so I am giving you a generic answer. See, scoring good marks require a perfect knowledge of the syllabus, question paper structure, previous year papers, strong hold on basics or fundamentals of any topic and last but not the least hard and smart work. To blend all of these, it requires determination and passion to score good marks. Also, you should take help from your seniors, teachers and guardians for any query. However, your question doesn't contain full details and hence we can't answer your query. Kindly furnish all the details and then we would surely assist you.