If All Four Input Resistors to a Summing Amplifier Are $\mathrm { k } \Omega$

Multiple Choice

If all four input resistors to a summing amplifier are 2.2 $\mathrm { k } \Omega$ and the feedback resistor is 2.2 $\mathrm { k } \Omega$ . then the gain equals________

A) 4
B) 2.2
C) 1
D) unknown