Who amongst the following sits exactly in the middle of the persons who sit fourth from the left and third from the right?

H sits fifth to the left of D and D does not sits at any of the extreme ends of the line, => Let H sits at the extreme left end and thus D sits third from the right end. 

Only two persons sit between H and I, => I sits third to the right of H. 

E sits third to the right of J and J is not an immediate neighbour of H, => J sit to the immediate left of D and E at the extreme right end. 

C is an immediate neighbour of G and G is not an immediate neighbour of I, => G sits to the immediate left of I and to the immediate right of H.

The vacant place to the immediate left of E is filled by F.

I sits 4th from the left and D sits 3rd from right, and J sits between I and D.

=> Ans - (B)