Step 1: Map articles.
{352}—National Emergency; {356}—President’s Rule in states; {360}—Financial Emergency; {370}—(now abrogated) special status of J& K.
Step 2: Define triggers.
National Emergency can be proclaimed on grounds of war, external aggression, or armed rebellion.
Step 3: Conclude.
\[
\boxed{\text{Article 352 (Option A).}}
\]