Which of the following statements is correct about the …

Which of the following statements is correct about the number of security groups and rules
applicable for an EC2-Classic instance and an EC2-VPC network interface?

A.
In EC2-Classic, you can associate an instance with up to 5 security groups and add up to 50 rules
to a security group. In EC2-VPC, you can associate a network interface with up to 500 security
groups and add up to 100 rules to a security group.

B.
In EC2-Classic, you can associate an instance with up to 500 security groups and add up to 50
rules to a security group. In EC2-VPC, you can associate a network interface with up to 5 security
groups and add up to 100 rules to a security group.

C.
In EC2-Classic, you can associate an instance with up to 5 security groups and add up to 100
rules to a security group. In EC2-VPC, you can associate a network interface with up to 500
security groups and add up to 50 rules to a security group.

D.
In EC2-Classic, you can associate an instance with up to 500 security groups and add up to 100
rules to a security group. In EC2-VPC, you can associate a network interface with up to 5 security
groups and add up to 50 rules to a security group.

Explanation:
A security group acts as a virtual firewall that controls the traffic for one or more instances. When
you launch an instance, you associate one or more security groups with the instance. You add
rules to each security group that allow traffic to or from its associated instances. If you’re using
EC2-Classic, you must use security groups created specifically for EC2-Classic. In EC2-Classic,
you can associate an instance with up to 500 security groups and add up to 100 rules to a
security group. If you’re using EC2-VPC, you must use security groups created specifically for
your VPC. In EC2-VPC, you can associate a network interface with up to 5 security groups and
add up to 50 rules to a security group.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html