select the correct match: Matthew Meselon - Pisum sativum; Alfred Hershey and Martha Chase - TMV; Francois Jacob and Jacques Monod - Lac operon; Alec Jeffreys - Streptococcus pneumoniae

The correct option is C Francois Jacob and Jacques Monod - Lac operon. Mathew Meselson and Franklin Stahl were the first to prove semiconservative replication of DNA in the bacterium Escherichia coli. Alec Jeffreys was a British geneticist who developed the technique of DNA fingerprinting or DNA profiling. Francois Jacob and Jacques Monod discovered the Lac operon in Escherichia coli and explained the protein synthesis regulation in prokaryotes. Alfred Hershey and Martha Chase proved that DNA is the genetic material that is passed or inherited from one generation to the next generation. Hence, the correct match is 3. So, the correct answer is option 3.