All of the following are cycloplegics except –: (A) Phenylephrine, (B) Atropine, (C) Homatropine, (D) Cocaine
Answer is A. Phenylephrine is not a cycloplegic, it causes mydriasis but no cycloplegia.

In addition to mydriasis, cocaine causes partial cycloplegia". __ Principles & practice of ophthalmology