The unit's digit of 13²⁰⁰³ is :

A. 1

B. 3

C. 7

D. 9

Answer: Option C

Solution(By Examveda Team)

3⁴ gives unit digit 1
So, (3⁴)⁵⁰⁰ gives unit digit 1
And, 3³ gives unit digit 7
∴ (13)²⁰⁰³ gives unit digit = (1 × 7) = 7