Please answer this question ??

Dear student,
Please find below the answer:

The correct option is (4).
Cross hybridization is a very tedious and time-consuming process. This is so because in cross-hybridization it is not necessary that in the first cross itself we'll get the desired characters in an offspring. In fact, usually, only one in a few hundred to a thousand crosses show desirable characters.

Hope this clears your doubt.
Regards.
 

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