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What is the order of the input resistance in 741 op-amp?

What is the order of the input resistance in 741 op-amp? Correct Answer 10<sup style="">6</sup> Ω 

Properties

Ideal Op-Amp

Practical Op-Amp

Voltage gain

Infinite

2 x 105

Input Impedance

Infinite

2 MΩ

Output Impedance

Zero

75 Ω

CMRR

Infinite

90 dB

Bandwidth

Infinite

1 MHz

Offset Voltage

Zero

2 mV

Slew Rate

Infinite

0.5 v/μ-sec

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