Which on of the following is grammatically correct?
1. After the mistake, he was relieved of his duties.
OR
After the mistake, he was relieved off his duties.
OR
After the mistake, he was relieved from his duties.
2. Rs.5500/- (Rupees Five thousand and five hundred only)
OR
Rs.5500/- (Rupees Five thousands and five hundreds only)

I have read following sentence in dawn newspaper but i need help in differentiating between following sentences:-
1. In August this year the PTI chief had announced that Reham Khan, will not be playing an active role in party affairs, following "attacks" on his then wife in the aftermath of the party's defeat in the NA-19 (Haripur) by-polls.
&

In August this year the PTI chief had announced that Reham Khan, will not play an active role in party affairs, following "attacks" on his then wife in the aftermath of the party's defeat in the NA-19 (Haripur) by-polls.