Step 1: Pick out the key clue.
The doctrine stops parties from transferring or altering immovable property while a related suit is still pending in court.
Step 2: Recall the source of this doctrine.
Section 52 of the Transfer of Property Act, 1882 lays down exactly this rule, known as the doctrine of lis pendens, meaning "pending litigation."
Step 3: Eliminate the other doctrines.
Subrogation deals with stepping into another's rights after paying a debt, acceleration deals with future interests vesting early, and estoppel stops a party from denying an earlier representation - none of these match a pending-suit transfer bar.
\[ \boxed{\text{Doctrine of Lis Pendens}} \]