Correct Answer - Option 3 : H.C.F of the two prime number is always 1
Concept used:
Prime number: A number that can be divided exactly by 1 and itself. for example 2, 3, 5 etc
1 is not a prime number
2 is only even prime number
2 is the smallest even prime number and 3 is the smallest odd prime number
Solution:
2 and 3 is the prime number and the sum is 5 and it is not an even number
∴ Option 2 is incorrect
The H.C.F of 2 and 3 is 1 and the H.C.F of the two prime number is always 1
∴ Option 3 is correct
The multiple of 2 and 3 is 6 which is not the prime number
∴ Option 4 is incorrect
From the above observation,
The correct answer is option 3