I got 58% marks in my 12th board with 46% marks in science , but didn't got any good engineering clg .should i give entrance one more time ?

Take drop one year and get preparation hard its better for your future. Hope its helpful Good luck

According to me you have to give 12 Improvement again for good % because 58 % is not good % for take admission in good college so you can drop in this year because you know that 12th 40 persentage count in Jee main Exam