CLEAN : India opposition campaign chief

The video tutorial begins with an introduction to the concept of substitution, followed by a discussion on presence and inquiry, ending with a question about the number of banks.

What is the main focus at the beginning of the video?

• A conclusion of the topic

• A detailed explanation of a concept

• A summary of the entire video

• An introduction and setup

Who is expected to arrive according to the video?

• A bank manager

• A person referred to as 'he'

• A student

• A teacher

What is being questioned towards the end of the video?

• The number of cars

• The number of houses

• The number of banks

• The number of people