A milkman attempts to understand if by displaying a large sign board labelled "buy two get one free"  scheme on one litre milk will result in an increase in sales. This farmer is undertaking what type of research?

Something that is about to happen

spiny-skinned invertebrates that are found on the ocean floor

Embittered 

A strongbox or small chest for holding valuables.

Choose the word which is opposite in meaning to the word - Congenial

Choose the correct synonym of the word - Verbose

To kill two birds with one stone 

Choose the correct ANTONYM for the given word .

Occupied

Select the most appropriate antonym of the given word.

Resilient 

Each one of us is in the __________ of happiness.

India is set to play a _________ role in the advancement of technology.