Which vegetable crop released by $IARI$,New Delhi,is enriched with Vitamin $C$?

Which of the following is a high-yielding variety of rice?

In India, $Jaya$ and $Ratna$ are the varieties of which crop that contributed to the Green Revolution?

Explain what is meant by biofortification.

The Indian Agricultural Research Institute $(IARI)$,New Delhi,has released several fortified vegetable crops that are rich in vitamins and minerals. These are:
$I$. Vitamin-$A$ enriched carrot,spinach,pumpkin
$II$. Vitamin-$C$ enriched bitter gourd,bathua,mustard,tomato
$III$. Iron and calcium enriched spinach and bathua
$IV$. Protein enriched broad beans,French bean,garden pea
Choose the correct option.

When two unrelated individuals or lines are crossed, the performance of the $F_1$ hybrid is often superior to both parents. This phenomenon is called .......