Discussion

Explanation:

Let the seats be 1-8 as shown below: 
 
A is opposite the person who lives in Haridwar. Let A be seated on seat 1. Hence, the person from Haridwar will sit on seat 5. 

B is to the immediate left of the person who lives in Haridwar. Hence, B sits on seat 6. 

H is to the immediate left of A and lives in Chennai i.e. H lives in Chennai and sits on seat 2. 

Also, B is adjacent ot G, who lives in Ludhiana. Since one neighbour of B is on seat 5, that means G lives in Ludhiana and sits on seat 7. 

G is adjacent to D and the person who lives in Pune. From the figure above, B lives in Pune and D sits on seat 8. 
  
C is opposite D. Hence, C sits on seat 4. Also, C is adjacent to F, who lives in Gurgaon. One of the two neighbours of C lives in Haridwar (seat 5). 

Hence, F lives in Gurgaon and sits on seat 3. Hence, E sits on seat 5 (only remaining seat). 

Now, three cities are left - Chandigarh, Bhopal, Mangalore - and three people are left - C, A, D. 

The person who lives in Chandigarh is to the immediate right of E. Hence, C lives in Chandigarh. 

H is not next to someone who lives in Bhopal. Hence, D lives in Bhopal and A lives in Mangalore. Hence, the final arrangement is: 

Hence, B lives in Pune. 

Hence, option (c).

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