Step 1: Understanding Section 13 of CPC:
Section 13 of the Civil Procedure Code provides that a foreign judgment shall be conclusive between the parties except in certain cases, such as lack of jurisdiction, fraud, breach of natural justice, or being contrary to Indian law or public policy.
Step 2: Jurisdictional Scope:
The challenge to the validity of a foreign judgment can only be made in a civil court because CPC governs civil proceedings. Criminal matters are not covered under CPC and are dealt with under the Criminal Procedure Code (CrPC).
Step 3: Final Conclusion:
The correct answer is (A) In a civil court only, as foreign judgments can be questioned in civil proceedings under Section 13 CPC.