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Eight railway stations A, B, C, D, E, F, G and H are connected either by two-way passages or one-way passages. One-way passages are from C to A, E to G, B to F, D to H, G to C, E to C and H to G. Two-way passages are between A and E, G and B, F and D, and E and D.

If the route between G and C is closed, which one of the following stations need not be passed through while travelling from H to C? 

(a) E 

(b) D 

(c) A 

(d) B

1 Answer

+1 vote
by (66.1k points)
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Best answer

Correct option (c) A

Explanation:

Now, route between G and C is closed. Hence, we get: 

Now while travelling from H to C, one must take the route: HGBFDEC 

Hence, one may not pass through A. 

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