Step 1: Recall the IS 800 recommendation.
For compression members, the maximum permissible slenderness ratio depends on the type of member.
Step 2: State the limit for a single angle single bolted strut.
According to IS 800,
\[
\boxed{\lambda_{\max}=180}
\]
for a single angle connected by one leg acting as a strut.
Hence,
\[
\boxed{(A)}
\]
is the correct answer.