Religious beliefs of Thomas Hardy are debatable but, but no one can dispute his compelling literary genius exemplified by far from the madding crowd or Tess of the d'ubervilles.

A. but no one can dispute his compelling literary genius
B. but none can dispute his compelling literary genius
C. but not a one can dispute his compelling literary genius
D. but no person can dispute his compelling literary genius
E. but none can dispute to his compelling literary genius

OA after some discussion