Match the electromagnetic methods in Group–I with their corresponding frequency range in Group–II.
Group–I:
P. Very Low Frequency
Q. Radio Magnetotelluric
R. Ground Penetrating Radar
S. Control Source Magnetotelluric
Group–II:
1. 10 MHz – 1 GHz
2. 1 Hz – 20 kHz
3. 100 kHz – 1 MHz
4. 15 kHz – 30 kHz