A transgenic food crop which may help in solving the problem of night blindness in developing countries is

Which of the following genetically engineered microbe is used in scavening of oil spills by digesting hydrocarbons of crude oil?

Maximum application of animal cell culture technology today is in the production of

Enzyme used in $ELISA$ test is

Main objective of production/use of herbicide resistant $GM$ crops is to
$(A)$ -Reduce herbicide accumulation in food articles for health safety.
$(B)$ -Eliminate weeds in the field without the use of herbicides
$(C)$ -Eliminate weeds from the field without the use of manual labour.
$(D)$ -Soil pollution and biomagnification caused by herbicides.
Which of the following statements are correct?