Which two ports are used with RADIUS authentication and authorization?(

Which two ports are used with RADIUS authentication and authorization?(Choose two.)

A.
TCP port 2002

B.
UDP port 2000

C.
UDP port 1645

D.
UDP port 1812

Explanation/Reference:
This question is about Ports Used by Cisco Secure ACS for Client Communication:

RADIUS authentication authorization use UDP protocol at port 1645 and 1812
RADIUS accounting use UDP protocol at port 1646 and 1813

about B option: The Administrative HTTP port for new sessions use TCP protocol at port 2002

There is NO services by cisco secure ACS use UDP port 2000, but there are services use TCP port 2000:

1- Cisco Secure ACS database replication TCP 2000
2- RDBMS synchronization TCP 2000
3- User-changeable password web application TCP 2000