Who among the following was not a proponent of Oxford Movement?

The correct option is Charles Kingsley.

Understanding the Oxford Movement
The Oxford Movement was a 19th-century movement of High Church Anglicans centered at the University of Oxford. Initiated in 1833, the movement sought to restore historical Catholic traditions, liturgy, and theology to the Church of England, arguing that Anglicanism was an apostolic branch of the universal church rather than a purely Protestant denomination.

Proponents of the Oxford Movement:
The key figures and leaders of this movement (often referred to as Tractarians because of their publication of the Tracts for the Times) included:
1. John Henry Newman: A primary leader and writer of many of the early tracts, who later converted to Roman Catholicism and became a Cardinal.
2. Edward Bouverie Pusey: A major theologian who gave the movement academic credibility and became its primary leader after Newman's conversion. Followers of the movement were often colloquially called "Puseyites" after him.
3. Richard Hurrell Froude: An influential early leader and close friend of Newman, whose posthumously published journals and letters further shaped the movement's theological trajectory.

Why Charles Kingsley was not a proponent:
Charles Kingsley was a prominent Broad Church priest, novelist, and social reformer who was a co-founder of the Christian Socialist movement. He was a vocal opponent of the Oxford Movement and Anglo-Catholicism, which he associated with superstition and a lack of transparency. Notably, a public theological clash between Charles Kingsley and John Henry Newman regarding truthfulness and the priesthood prompted Newman to write his celebrated autobiography, Apologia Pro Vita Sua.