Who among the following in the article. “Fleshly school of poetry”. Attacked the pre-Raphaelites, especially D.G. Rossetti?

The correct option is Robert Buchanan.

Explanation:
"The Fleshly School of Poetry" is the title of a famous pamphlet and essay published in October 1871 in The Contemporary Review under the pseudonym "Thomas Maitland". The real author behind this pseudonym was the Scottish poet and critic Robert Buchanan.
In this article, Buchanan launched a scathing literary attack on the Pre-Raphaelite Brotherhood, specifically targeting the poetry of Dante Gabriel Rossetti (along with William Morris and others). He criticized their work for being overly sensual, morbid, and focusing excessively on physical and bodily detail at the expense of spiritual and intellectual elements, labelling it as "fleshly".
Rossetti responded to this harsh criticism later that same year with a famous essay titled "The Stealthy School of Criticism", defending his poetry and exposing Buchanan's use of a pseudonym to review and praise his own work while attacking others.