Four Series Resistors Are Connected Across a 30 V $\mathrm { kO }$

Multiple Choice

Four series resistors are connected across a 30 V source and carry 0.125mA . If R1=10 $\mathrm { kO }$ , R2=33 $\mathrm { k } \Omega$ and R3=47 $\mathrm { k } \Omega$ , what is the value of R4 ?

A) 15 $\mathrm { k } \Omega$
B) 150 $\Omega$
C) 150 $\mathrm { kQ }$
D) 1.5 $\mathrm { k } \Omega$