Option 1 -> Herpetology is the broader study of reptiles and amphibians, which includes lizards but is not specific to them.
Option 2 -> Saurology is the specific branch dealing exclusively with lizards (derived from Greek "sauros" meaning lizard).
Option 3 -> Ophiology is the study of snakes specifically.
Option 4 -> Cheloniology is the study of turtles and tortoises.
Hence, Saurology -> While herpetology covers all reptiles and amphibians, saurology is the precise scientific term for the study dedicated specifically to lizards -> correct