The total number of distinct alkenes which can result from `E_(2)` elimination of the compound below is

Elimination E2

The total number of optically inactive products obtained from the complete ozonolysis of the compound given below here is

The order of E_(2) elimination for alkyl halide is

The total number of5 -digit numbers that can be composed of distinct digits from 0 to 9 is

Let A=(1,2,3) .The total number of distinct relations that can be defined over A is