Explanation
A person who claims that God is unknowable is known as an :
C) Agnostic
Explanation: An agnostic is someone who believes that the existence or nature of God or gods is ultimately unknown or unknowable. They hold the view that it is impossible for humans to have knowledge or certainty about the existence or non-existence of a higher power. Agnostics often take the position of withholding belief or judgment on the matter, stating that the existence of God cannot be proven or disproven through human understanding or evidence. Option A) Atheist (a person who does not believe in the existence of God or gods), B) Irreligious (someone who lacks religious beliefs or practices), and D) Iconoclast (a person who challenges or opposes established beliefs or traditions) do not specifically describe someone who claims God as unknowable.