QUESTION 1 Which relations are partial order? None of the propsed relations O A={5,6,8,10,20} and R={(a,b) EAXA, a divides b} O Let A={1,5,6,8,10) and R={(1,1), (5,5), (8,8), (10,10), (1,5), (5,6), (1,6).(6,8)} Let A={1,5,6,8,10} and R={(1,1), (5,5), (8,8), (10,10), (1,5), (5,6), (1,6), (6,6)}