An oscilloscope has an input resistance of $1 \mathrm{M} \Omega$. A $10$ X passive attenuating probe is connected to it to increase the input voltage range as well as the effective input resistance. The effective input resistance, in $\mathrm{M} \Omega$, seen into the probe tip is
- $0.9$
- $9.1$
- $10$
- $11$
