Arun, Gori, Hemant, Vedant, Yuvati and Zain are sitting in a straight…

Case 1 :

a) Yuvati at one corner

b) Hemant at the 4^th left of Yuvati, as there is not left position in this case, so this pattern will not be followed.

Case 2 :

a) Yuvati at one corner

b) Hemant is at 4^th left of Yuvati

c) Gori is 4^th left of Arun. Let Arun sit at 1^st left of Yuvati

d) Because Gori is at 4^th left of Arun, this is possible in only that position of Arun

e) Zain is 3^rd to right of Gori

f) Only one position left for Vedant

= at 2^nd right of Zain is Yuvati.