The correct option is D Do not touch the open electric wires
For convenience , we assign numbers to each word :
allow children to play on the ground
1 2 3 4 5 6 7
It has been coded as :
play allow on children the to ground
4 1 5 2 6 3 7
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Hence the given code is :
the do open not electric touch wires
4 1 5 2 6 3 7
Now arranging them as 1 2 3 4 5 6 7, we have "do not touch the open electric wires'.
Hence, option (3) is correct answer.