Questions

We know that, there are 7 continents in the world. They are :

Asia, Africa, Australia, North America, South America, Europe and Antarctica.

Africa - 53 countries

Asia - 48 countries

Europe - 45 countries

Antarctica - 0 countries

Hence, the continent Africa has most number of countries with 53 countries and in second place Asia has 48 , third Europe has 45 countries.

Oxytocin is a mamallian hormone and also acts as neuro transmitter in the brain.

Dull means not sharp, not shining, not bright, ...

Hence, the given words are all that means the opposite of dull.

National Institute of Aeronautical Engineering is located at Dehradun, Uttaranchal, India.