-Refer to the Above Figure $\mathrm { P } _ { 4 }$

-Refer to the above figure.What price-output combination would apply under perfect competition?

A) $\mathrm { P } _ { 4 }$ and
$\mathrm { Q } _ { 1 }$
B) $\mathrm { P } _ { 3 }$ and
$\mathrm { Q } _ { 2 }$
C) $P _ { 2 }$ and
$\mathrm { Q } _ { 3 }$
D) $P _ { 1 }$ and
$\mathrm { Q } _ { 1 }$