Ans: (B)
Explanation: Degree sequence of the given graph 4-2-2-2-2-2-1-1.
Degree sequene for other options:
A) 4-3 failed
C) 3- failed
For B) and D) degree sequence matches with given 4-2-2-2-2-2-1-1. Comparing B) , D) and original graph: original graph has 5-cycle. But D) have only 4-cycle.
B) matches all the criterias for isomorphic graph.