can we rollback data with delete code example

Example 1: can you rollback with delete clause

yes, since this DELETE clause is from DML, 
we can use ROLLBACK to recover the data.

Example 2: can we rollback data with drop

No we can't rollback data by using DROP

Example 3: can we rollback data that are deleted using DELETE

yes, since this DELETE clause is from DML,
we can use ROLLBACK to recover the data.