If the constant term in the binomial expansion of 10 2 æ ö ç ÷ è ø k x x is 405, then |k| equals: [

Question:
If the constant term in the binomial expansion of $\left(\sqrt{x} \frac{k}{x^{2}}\right)^{10}$ is 405 , then $|k|$ equals: $\quad$

Correct Option: 3

JEE Main Previous Year 1 Question of JEE Main from Mathematics Binomial Theorem and its Simple Applications chapter.