After one round of replication, every new DNA double helix would be a hybrid that consisted of one strand of old DNA bound to one strand of newly synthesized DNA strand. This scheme is termed as 

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Correct option is A

After one round of replication, every new DNA double helix would be a hybrid that consisted of one strand of old DNA bound to one strand of newly synthesized DNA. This scheme is termed as Semi-conservative DNA Replication.In the conservative model, the parental molecule directs synthesis of an entirely new double-stranded molecule.According to the dispersive model, every round of replication would result in hybrids, or DNA double helices that are part original DNA and part new DNA. Each subsequent round of replication would then produce double helices with greater amounts of new DNA.complementary DNA (cDNA) is DNA synthesized from a single-stranded RNA template in a reaction catalysed by the enzyme reverse transcriptase.