What will ELB do?

A user is configuring the HTTPS protocol on a front end ELB and the SSL protocol for the back-end listener in ELB. What
will ELB do?

A.
It will allow you to create the configuration, but the instance will not pass the health check

B.
Receives requests on HTTPS and sends it to the back end instance on SSL

C.
It will not allow you to create this configuration

D.
It will allow you to create the configuration, but ELB will not work as expected

Explanation:
If a user is configuring HTTPS on the front end and TCP on the back end, ELB will not allow saving these listeners and
will respond with the message:
“Load Balancer protocol is an application layer protocol, but instance protocol is not. Both the Load Balancer protocol
and the instance protocol should be at the same layer. Please fix.”
http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/elb-troubleshooting.html