Question

If a suitable female base is available the can be tested for their fertility
restorer can be exploited in heterosis breeding. *
O Pureline
O Multiline
O Both a & b
O None of these​

Answer 1

Answer:

If a suitable female base is available the can be tested for their fertility restorer can be exploited in heterosis breeding. * O Pureline O Multiline

so option both a & b