i have 2 clear iit what things i have to keep in mind

There is no one man’s mantra or shortcut to get into your dream ! You need to prepare, prepare and prepare hard to outshine others. Don’t just study. Do proper study making good understanding with practice.Books/ Study Material plays an important role in making the concepts. Select them, discuss them with your peers or mentors, to get the right ones in your kitty.
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good luck!