Whether the appeal could be decided by a judge sitting singly

No. Appeal filed before the High Court, shall be heard by a bench of not less than two Judges of the High Court, and shall be decided in accordance with the opinion of such Judges or of the majority, if any, of such Judges.
Where there is no such majority, the Judges shall state the point of law upon which they differ and the case shall, then, be heard upon that point only, by one or more of the other Judges of the High Court and such point shall be decided according to the opinion of the majority of the Judges who have heard the case including those who first heard it.

(ICAI FAQ PUBLICATIONS 06-09-2017 APPEALS TO HIGH COURT: FAQ NO. 61)