Explanation:

To convert octal to hexadecimal, we first write binary format of the number and then make groups of 4 bits from right to left, as follows:

 5     4      0     1
101   100    000    001   (octal -> binary)
1011     0000    0001     ( groups of 4)
B         0       1       ( hexadecimal equivalent)
Therefore, the hexadecimal equivalent is (B01)16.