Concept:Relation puzzles are solved by replacing each family member with the closest known relation.Explanation:"Only son of my grandfather" is Shreya’s father."His brother's father" means Binod’s father.Both phrases refer to the same person.So Binod's father is also Shreya's father.Therefore, Binod and Shreya share the same father.Hence, Binod is Shreya’s brother.Answer:Option A: Brother