Indicate the right option to search for anything not a letter or number

Question

Admin · Accepted Answer

grep &lsquo;[^a-zA-Z0-9]&rsquo;

Admin · Answer

grep &lsquo;^[a-zA-Z0-9]&rsquo;

Admin · Answer

grep &lsquo;[a-zA-Z0-9]&rsquo;

Admin · Answer

None of the above

Q. Indicate the right option to search for anything not a letter or number