it would be $t_1>t_2$, because the first case is the worst case of quicksort i.e. minimum number is chosen as pivot. Hence in the worst case the comparisons are high.
The splitting occurs as
$[1] [2345]$
$[2] [345]$
$[3] [45]$
$[4] [5]$
and
$[123] [45]$
$[1] [23] [4][5]$
$[2] [3]$
Number of recursive calls remain the same, but in second case the number of elements passed for the recursive call is less and hence the number of comparisons also less.
Correct Answer: $C$