how to get a good marks in engineering entrance exam

total quations in engineering 160

maths(1a,2a)  =======40
maths(1b,2b)  ========40
phy(1st,2nd year)======40
che(1st,2nd year)========40
total          =======================
                                   160
                 ========================
state board setting the quation paper of answers like agiven bellow

given quation has 4 multiple choice
1 a   (answer comes possibility 40 times  )
2 b   (answer comes possibility 40 times  )
3 c   (answer comes possibility 40 times  )
4 d   (answer comes possibility 40 times  )

it is rule for setting of our examination