Alpha, Beta, Gamma and Delta are playing cards. All of them has one card which is laid down on the table along with two different colors on each side. None of the card contains same color on both of the sides. The colors visible on the table below them are red, green, red and blue respectively. All of them see the color present on the reverse sides and comments the following
Alpha: Yellow or Green
Beta: Neither Blue nor Green
Gamma: Blue or Yellow
Delta: Blue or Yellow
Consider the situation that out of them, two always lie.
Find out the colors on the cards of each person ?