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Anonymous User Best Answer
Sn=(-1)^n then it's subsequnce monoton and Convergent but sn is bounded so A true Sn=(-1)^n then it's subsequnce monoton and Convergent but sn not Convergent so B not true Sn=1/n then it all subsequnce are Convergent to 0 and sn is also Convergent and bounded so c,D true