The incident which shows an example of theme of unity is the scene in which Siddhartha first meets Vasudeva.
Siddhartha is a novel written by Herman Hesse which was published in 1922 in Germany.
Siddhartha or Siddharth was the birth name of Gautama Buddha, the founder of Buddhism. The novel is about the journey of Gautam Buddha and his principles.
Siddhartha merges into Unity which means that he attains his ultimate goal. The River when he meets Vasudeva is essential in helping Siddhartha come to an important realization of Unity.
Therefore, the correct option is (b).
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