Read the given information carefully and answer the questions based on it: Eight persons sit in a row. Four persons face north and rest face south. Th...

Read the given information carefully and answer the questions based on it: Eight persons sit in a row. Four persons face north and rest face south. Three persons sit between A and B and one of them sits at the end of the row. C sits second to the right of B who faces north. D and B face same direction but they do not sit adjacent to each other. E sits third to the left of D and faces opposite direction to D. G sits third to the right of C. Both the immediate neighbors of G face same direction. H sits to the right of F.
If all the persons rearrange their seating positions such that they sit in alphabetical order from the left end of the row (with the direction each person faces remaining unchanged), how many persons will remain in their original positions?