Question $1$

$2$ pts

In the ARM Cortex MO instruction set, for the instruction MOVS $rx,$#$n,$ which hexadecimal digit of the machine code identifies the register, $rx,$ used? $q,$

$2$nd

$4$th $($least significant hex digit$)$

$1$st$\text{'}($most significant hex digit$)$

$3rd$

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