Teaching SUPER TET - UP Assistant Teacher Mock Test Series General Science Chemistry Chemistry in Everyday Life

चहा, कोकोआ आणि कोला पेयांमध्ये ________ हे उत्तेजक असते.

1
कॅफिन 
2
कषाय 
3
टॅनिन 
4
कोकेन 
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