List of top Mathematics Questions on sets asked in JEE Advanced

Let 
$S_{1}=\{( i , j , k ): i , j , k \in\{1,2, \ldots , 10\}\},$ 
$S_{2}=\{( i , j ): 1 \leq i < j +2 \leq 10, i , j \in\{1,2, \ldots 10\}\},$ 
$S_{3}=\{( i , j , k , l ): 1 \leq i < j < k < l , i , j , k , l \in\{1,2, \ldots , 10\}\}$ and 
$S_{4}=\{( i , j , k , l ): i , j , k$ and $l$ are distinct elements in $\{1,2, \ldots , 10\}\}$.
 If the total number of elements in the set $S_{ r }$ is $n_{ r }, r =1,2,3,4$, then which of the following statements is(are) TRUE?