Off topic:Comparing two columns and replace in R Package

Question

[misterie]

I have a problem with using for loop. My problem is: if two columns are equal (have 176 or 184 or 180 or 182 or 163 or 167 value) replace two columns =NA.

I would like to replace the first, fifth and last columns should be replace for NA because both columns contain 176 or 184 or 180 or 182 or 163 or 167 value. The condition is a the same value in both columns.

Thank you!