There are 25 girls in a horizontal row. After shifting, Rekha occupies the middle position.
For 25 girls in a row, the middle position is:
Middle position =225+1
Middle position =226
Middle position =13
So after shifting, Rekha is at the 13th position from the left.
Rekha was shifted 3 places towards her right side to reach the 13th position.
Original position =13−3
Original position =10
Therefore, Rekha's original position was 10th from the left end of the row.
The answer is Option 4: 10th.