REPUBLIC V HIGH COURT, DENU; EX PARTE AVADALI IV     Practice and procedure—Writ—Setting aside—Conditional appearance—Objection to jurisdiction—Options available to defendant objecting to jurisdiction—Defendant objecting to jurisdiction of High Court after entry of conditional appearance and before filing defence—Whether defendant obliged to object to jurisdiction only in statement of defence—High Court (Civil Procedure) Rules, 1954 (LN 140A), Order 12, r24.