Hello,
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Chengalpattu Is one of the best college in Chennai.Point to be observed is omandurar comes after Chengalpattu College.According to me the information you have received is irrelevant.
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Chengalpattu is the best rated college you can see in Chennai.I would suggest you to join  this college.It has a good environment and a friendly Nature..
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If you are still not satisfied then you can go for 2nd counseling,but see that you won't get a low rated college compared to this..
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Choosing accordingly.
Best of luck