Step 1: Provision.
Article 360 provides for Financial Emergency in case of a threat to financial stability or credit of India or any part thereof.
Step 2: Historical note.
Unlike National Emergency (declared 3 times) and President's Rule in states (frequent), no Financial Emergency has ever been proclaimed.
Step 3: Consequence if declared (for understanding).
It would allow central control over financial matters, including directions to states, and modification of salary structures for certain categories.
Step 4: Conclude.
\[
\boxed{\text{Never (Option D).}}
\]