Which of the following is not a valid keyword in C++

Axenic culture is 

Super rice is developed by

Which of the following animal has longest gestation period:

Group thinking has a danger of ......................? 

Which one of the following is the good example of subsistence farming?

Phenol reacts with zinc dust gives:

Oxygen is transported in the insect body mainly through which of the following systems?

The plant-origin insecticide, "Azadirachtin" is derived from which plant?

The practice of raising plants and animals is called .................................?

Which combination insect and symptom of damage is wrong?