@Manoja Rajalakshmi A Could you please explain how option (A) is right.

In Question, it is mentioned term "Vertex cover" but not "Minimum Vertex Cover" as vertex cover can have all the vertices of the graph (in worst case) but there is no any independent set which contains all the vertices in graph (except the case when each vertex is isolated vertex). So in my view option (A) is also wrong **Only option (B) is right.**

**Correct me if ****i**** am wrong.**