Seven persons A, B, C, D, E, F, and G sit in a linear row from the west to the east end, but not necessarily in the same order. 
All persons are facing towards the north direction.
Three persons sit between C and E. 
Neither C nor E sits at any end of the row. 

B sits third to the left of D. Neither C nor E is neighbour of D. 

One person sits between F and G, who sits second to the right of A. 

Atleast two persons sit between E and G.
Therefore, case 1 is invalid. 
Therefore, the final arrangement is:

Only statement I is true.