If Meselson and Stahl's experiment is co...

If Meselson and Stahl's experiment is continued for four generations in bacteria, the ratio of `overset(15)N//overset(15)N: overset(15)N//overset(14):overset(14)//overset(14)N` containing DNA in the fourth generation would be

`1:1:0`

`1:4:0`

`0:1:3`

`0:1:7`

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If Meselson and Stahl's experiment is continued for four generations in bacteria, the ratio of overset(15)N//overset(15)N: overset(15)N//overset(14)N:overset(14)N//overset(14)N containing DNA in the fourth generation would be

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