In a Three-Branch Parallel Circuit, R₁=1 $\mathrm { M } \Omega$

Multiple Choice

In a three-branch parallel circuit, R₁=1.2 $\mathrm { M } \Omega$ , R₂=1 $\mathrm { M } \Omega$ and R_T=0.5 $\mathrm { M } \Omega$ . Calculate R₃ .

A) 6 $\mathrm { M } \Omega$
B) 2 $\mathrm { M } \Omega$
C) 7.7 $\mathrm { M } \Omega$
D) 1.7 $\mathrm { M } \Omega$