Correct Answer - Option 2 : 2
Concept used
By option method
Calculation
Prime number are number that have only 2 factors
Option 1 - (9) factors of 9 = 1, 3 and 9
Option 2 - 2 factors of 2 = 1 and 2
Option 3 - 4 factors of 4 = 1, 2 and 4
Option 4 - 8 factors of 8 = 1, 2, 4, 8
∴ Prime number out of four option is option second i;e 2
