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Hello Abantika,
In science, you have engineering and medical. These are the traditional streams students choose. Some new streams are also in demand nowadays like bio- tech, nano-technology, agriculture and genetic.
Students are also moving in fashion designing and interior designing. Research oriented students can go for KVPY and get into institutes like IISC or IISERs.
There are courses like mechanical/ electrical and computer science in engineering to newer ones like hotel management and fashion designing. You can opt for any of these as per your interest.
I hope it helps. If so, kindly upvote this answer.If you have any further questions, kindly revert.

Hi Chetan,
Magnesium has a very energetic combustion reaction with oxygen, where two atoms of magnesium bond with one molecule of oxygen gas to form two molecules of magnesium oxide. This reaction is extremely exothermic, releasing a great deal of heat and light, which is why magnesium fuses are used to initiate reactions such as the thermite reaction, and magnesium is used in flares for high visibility.
The reaction of magnesium to oxygen is so energetically favorable that burning magnesium can steal the oxygen from both water and carbon dioxide, making these common methods of dousing flames ineffective to stop magnesium combustion.
Magnesium is an alkaline earth metal, which is highly reactive because of its strong tendency to lose two electrons for more stable electron orbitals. This property is one reason why it reacts so strongly with oxygen, which tends to take on two extra electrons for a more stable configuration. Magnesium has an atomic number one greater than sodium, an even more reactive metal.
Magnesium is also a crucial nutrient for many animals, including humans, where it plays several roles alongside calcium, another alkaline earth metal directly below it on the periodic table. Magnesium fires are dangerous, requiring a dry powder fire extinguisher and eye protection for its very bright combustion to handle safely.
All the best.