For developing inbred lines in farm animals, following factors are taken into consideration: 1. The crossbreds should be of outstanding type. 2. They should not carry any detrimental genes. 3. Progeney tested animals. 4. Herd size should be large. Of the statements given above, which one of the following combinations of factors is most essential ?
Options
(a)1 and 3
(b)2 and 3
(c)1 and 4
(d)2 and 4
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