Editor - ISC
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease
As mentioned by Ms.Pranita, if the key is from a reliable source like professors, corporate colleges and academic institutions, we can believe them.
We need not worry about these keys because they are not official and only for comparison. It is reliable or not,it makes no difference. But the key given by CBSE is official and valuation will also be done on the basis of this key. So they should be very sure of the answers they give. They take more time for this authentication only I thonk.