Select the word or phrase which best expresses the meaning of the word typed in bold: The agnostic demanded proof before he would accept the statement of the secretary.

Op 1: The pessimist 
Op 2: The sceptic 
Op 3: Sceptic about the existence of god or any ultimate reality 
Op 4: The atheist

Solution:

Option:4 (Sceptic about the existence of god or any ultimate reality )

a person who believes that nothing is known or can be known of the existence or nature of God or of anything beyond material phenomena; a person who claims neither faith nor disbelief in God.