Ad-hoc judges are appointed on the Supreme Court when:

A) Some judges go on long leave

B) No one is available for permanent appointment

C) There is an abnormal increase in cases pending before the Cour

D) There is no quorum of the Judges available to hold any session of the Court

This MCQ is part of the UP PSC Previous Year Questions (PYQs) series, focusing on UPPSC Prelims 2000 (GS Paper I)