What will happen in this scenario?

A user has created a public subnet with VPC and launched an EC2 instance within it. The user is trying to delete the subnet.

What will happen in this scenario?
A . It will delete the subnet and make the EC2 instance as a part of the default subnet
B . It will not allow the user to delete the subnet until the instances are terminated
C . It will delete the subnet as well as terminate the instances
D . The subnet can never be deleted independently, but the user has to delete the VPC first

Answer: B

Explanation:

A Virtual Private Cloud (VPC) is a virtual network dedicated to the user’s AWS account. A user can create a subnet with VPC and launch instances inside that subnet. When an instance is launched it will have a network interface attached with it. The user cannot delete the subnet until he terminates the instance and deletes the network interface.