Can't say of any pattern for sure but what Islamic History checkers did in CE-2009 was quite unfair & has been duly criticized; CE-2011 is yet to come, but I think CE-2010 result might burst its bubble. And if it again proved generous this time, then it might the next best thing among history subjects.

I am looking forward to the same trend/difficulty level in my subjects this year; lets see.

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Don't trust your heart, its not on the right side.