"LinkedIn" is the correct answer for the above question.
Explanation:
LinkedIn is used to build a connection between people and communicate. But it is used to connect only business type contacts.
So, when any user wants to make any business type of contacts, then he can do this with the help of making an account on LinkedIn and then add the business people on it.
The above question asked about the networking site which is used to connect the business contacts. This site is known as LinkedIn.
