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This question has Statement $-1$ and Statement $-2$ . Of the four choices given after the statements, choose the one that best describes the two statements
Statement $-1$ : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals
Statement $-2$ : The state of ionosphere varies from hour to hour, day to day and season to season
Statement $-1$ is true, Statement $-2$ is true and Statement $-2$ is not the correct explanation of Statement $-1$
Statement $-1$ is false, Statement $-2$ is true
Statement $-1$ is true, Statement $-2$ is false
Statement $-1$ is true, Statement $-2$ is true and Statement $-2$ is the correct explanation of statement $-1$
Solution
for long distance communication, sky wave signals are used
Also, the state of ionosphere varius every time so both satatement are correct
