1 Answers

Option 1 : A and B live on the same street

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When  A comes out of his house he is facing East and then turns left so faces North.

When  B comes out of his house he is facing west and then turns left so faces  South.

1) C and D live on the same street → Definite(As it is given that they live on a road going north-south)

2) C’s house faces south. → Not definite

3) Houses of C & D are less then 20 km apart. → Not definite (Difference between A and B is not given)

4) None of the above. → Not possible as third option is definite.

Hence, A and B live on the same street.

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