Which of the following works is NOT written by P. B Shelley?

The correct option is The Vision of Judgement.

To understand why this is the correct answer, let us look at the authorship of each of the works listed in the options:
1. The Vision of Judgement: This satirical poem was written by Lord Byron (George Gordon Byron) in 1821 and published in 1822. It was written as a parody and direct response to Robert Southey's laudatory poem A Vision of Judgement, which praised King George III. Since it was authored by Lord Byron, it is NOT a work by Percy Bysshe Shelley.
2. The Mask of Anarchy: This is a political protest poem written by Percy Bysshe Shelley in 1819 in response to the Peterloo Massacre. It is famous for its call for non-violent resistance.
3. Queen Mab: A Philosophical Poem: This is a major early poem written by Percy Bysshe Shelley, published in 1813, which presents a utopian vision of a humanity liberated by reason and love.
4. The Revolt of Islam: This is an epic poem in twelve cantos composed by Percy Bysshe Shelley in 1817, which serves as a symbolic vision of revolution and social reform.

Therefore, since The Vision of Judgement was written by Lord Byron, it is the only work among the choices that was not written by P. B. Shelley.