can someone explain how to solve this?

You have two HEX numbers that we need to add, which of the following will be the output.

LDA T

CIL

CLA

SZE

LDAA

ADD B

STA C

HLT

T$,$ HEX $000$F

A$,$ HEX A$000$

B$,$ HEX $00$B$0$

C$,$ Hex $0000$

Selected Answer:

$C=A+B=$ HEX $A0B0$

Correct Answer:

$C=B=$HEx$00B0$