Hello. could u plz guide me as to wch branch can i opt in BE so tat i can do ME in aerospace?.

At many IITs, Candidates with B.E./B.Tech. degree in Aerospace / Aeronautical, Mechanical, Automobile, Production, Civil, Chemical, Naval Architecture, Electrical, Electronics / Electronics and Communication, Metallurgy / Metallurgy & Material Science, Instrumentation, Mechatronics; four year BS deg