Best Answer Explained in Below-:

The correct answer is B) Keats, as he stands out from the other names listed due to his distinct literary period and style. Wordsworth, Shelley, and Milton are associated with the Romantic period and earlier. Wordsworth and Shelley are prominent Romantic poets, known for their focus on nature, emotion, and individualism, while Milton, though earlier, is often linked to the transition towards Romantic themes, especially in works like "Paradise Lost."

On the other hand, John Keats is indeed a Romantic poet; however, he embodies a more specific aspect of Romanticism, emphasizing beauty, imagination, and the transient nature of life. His works, such as "Ode to a Nightingale" and "Ode on a Grecian Urn," showcase a deep fascination with aesthetic experience and sensory detail, which sets him apart from the broader philosophical concerns of Wordsworth and Shelley or the earlier epic narrative style of Milton.

Therefore, the odd one out is B) Keats, as he represents the culmination of Romantic ideals focused on beauty and individual experience, while the others are linked more closely with the broader themes and historical transitions surrounding the earlier Romantic movement.