ANS:C - semi-conservative theory

I think the answer should be a dispersive theory.

According to the hypothesises and the knowledge of DNA there was two scientist who have done further experiments regarding DNA according to them first they have used the semi conservative method secondly the conservative method and finally it was prooved that the dispersive theory is the accepted hypothesis for DNA replication.

If anybody have a doubt means refer to the internet and books regarding DNA. Thank you.