what argument reason if A

$^$

$$B

$,$

$$Modus Tollens Code, Premise Disjunctive,

Syllogism,

$$DeMorgan$,$

$$Premise for

Conditional

Method,

$$Disjunctive

Addi,

$$Conditional

$$Premise for

Indirect

Method,

$$Conjunctive

Simplification,

$$Contrapositive$,$ Modus

Ponens,

Conjunctive Add

$$Contradiction

In Argument A: A

$/$

$\backslash$

$$B

$($

$$~ M

$\backslash$

$/$

$$N

$)$

$\backslash$

$/$

$$~ B

$($

$$~ M

$\backslash$

$/$

$$N

$)$

$$

$$P

P

$\backslash$

$/$

$$R is A

Contradiction

What is the argument for B

$?$