Correct option is B
Given:
The least prime number = 2
The least composite natural number = 4
Solution:
The factors of 2 (prime number) are: 1, 2.
The factors of 4 (composite number) are: 1, 2, 4.
The common factors of 2 and 4 are: 1, 2.
The greatest common factor is 2.
The HCF of 2 and 4 is 2.