If 3^2019 is divided by 10, then what is the remainder?
A
1
B
3
C
7
D
9
Correct Answer: Option C
Explanation
1. **Translate the Question:** The problem asks for the remainder when $3^{2019}$ is divided by 10. Based on our PYQ analysis, specifically 'Unit Digit Logic' [3] [11], we know that finding the remainder by 10 is exactly the same as finding t