With reference to the Types of Cyber Attacks, consider the following pairs:

S. No.	Types of Cyber Attacks	About
1.	Phishing	It is the method of trying to gather personal information using deceptive e-mails and websites
2.	Man-in-the-middle (MitM) attack	It relies on human interaction to trick users into breaking security procedures and gain sensitive information that is typically protected.
3.	Social engineering	It occurs when attackers insert themselves into a two-party transaction.
4.	Denial of Service attacks	It is an attack meant to shut down a machine or network, making it inaccessible to its intended users

How many pairs given above is/are correctly matched?