Explanation:

- Explanation V of Section 11 CPC deals with the bar of res judicata concerning issues which might and ought to have been raised.

- Option 1: If the relief claimed is substantial relief – Explanation V still applies, as it bars a subsequent suit on the same ground regardless of whether the earlier relief was substantial or minor.

- Option 2: If the relief claimed is obligatory on the court to grant – Even if a court is bound to grant a particular relief, Explanation V would still apply.

- Option 3: Both (A) and (B) – This option suggests that Explanation V does not apply in both these scenarios, which is incorrect.

- Option 4: None of these – Means Explanation V applies in both situations.

Option 4: None of these is correct.