Questions

Demat means Dematerialisation of share, in simple it is an account with which a person can trade in security market without which a person cannot buy or sell any share in security market. 

International Plastic Bag Free Day was observed on 3rd of July 2017. It has been dedicated to heightening awareness about plastic and disposable carrying devices. International Plastic Bag Free Day gives us an opportunity to remind ourselves, and others, that every action we take, and every bag we dispose of effects the lives of everyone in the world for generations to come.

The vice President is the chairman of Rajya Sabha. The chairman of Rajya Sabha is not the member of the house.

The first central legislative assembly constituted in the year 1920.

In the given options, "His stomach rumbled like an approaching train" is an example of Simile.

All the other options are examples of metaphors. 

Simile and Metaphor are both figure of speeches in English which are used for comparing things but the only difference is Simile uses LIKE or AS words in comparing and metaphor directly compares without using any words.