The 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 generel , less stable then ground wave signals
statement - 2 : The state of inosphere varies from to hour day and season to season .
A. both `A`and `B` are true
B. both `A` and `B` are false
C. `A` is true and `B` is false
D. `A` is false and `B` is true