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The correct answer is option 3: Both 1 and 2.
Statement 1 states that ISRO has given clearance for using the frequency from the KU band for providing internet on trains in India. This statement is correct. ISRO, the Indian Space Research Organisation, has indeed given clearance for using the KU band frequency for satellite communication to provide internet services on trains. This move by ISRO aims to improve the availability of internet connectivity in moving trains across the country.
Statement 2 states that the KU frequency range is exclusively allocated for use by satellite communication systems. This statement is also correct. The KU band frequency range is specifically allocated for satellite communication, and it is widely used for various satellite-based communication services, including television broadcasting, broadband internet, and voice communication.
Therefore, both statements 1 and 2 are correct, and the correct answer is option 3.