square based puzzle level 2 test 2

There are eight persons - M, N, O, P, Q, R, T and S - who are sitting around a square table such that four of them sit on the middle side of table and facing away from the center and other four of them sit at the corner of table and they are facing towards the center of the table. They all are doing research in different field viz. Heart surgery, Obesity, Cancer, Autism, Depression, Plastic Surgery, Sleep and Drug Abuse but not necessarily in the same order. They like different colour's viz. Red, Green, Black, White, Yellow, Violet, Blue and Orange but not necessarily in the same order. The one who likes violet, researchers on Depression and he does not faces inside. N sits third to the right of T who like Green. Q sits second to the right of P. Q researches on Sleep. S researches on Drug abuse and he does not like white or red or orange. The one who researches on Plastic surgery sits opposite to the one who is doing his research on Heart surgery. R is doing his research on Cancer and sits third to the left P who likes Blue. P faces inside. P is an immediate neighbour of N. S sits second to the right of R. M likes Black and he does not research on Heart or Plastic surgery. P does not research on Plastic Surgery. O does not sit in the middle. The one who research on Autism sits opposite to the one who likes yellow. O does not likes orange or Red. The one who likes orange faces outside. O does not research on obesity.