New argument in appeal

No. crucial issue of readyness & willingness proved in suit. Borrowal loan proves B's ability to mobilis the fund. That will do for specific performance of agreement. 

^^ agreed...

I agree  with other experts and submit that a plea which  is not taken earlier  is constructively  barred by resjudicata.you can consider Explanation  4 to section 11 of the code of civil procedure.

Hello sir,

i the above case both the parties came to settle the matter out of the court (now case is in the appeal court) i.e, got in to a new agreement of sales deed in which

1) B has to cancel the appeal before 1 month.

2)A has to pay B in three months and get he sale deed registered by B.

If B withdraws appeal from the appeal court can A be able to approach lower court and ask the court to execute its decree which was stayed by appeal court ?

if yes how can B secure his bona fides?

Hello sir,

i the above case both the parties came to settle the matter out of the court (now case is in the appeal court) i.e, got in to a new agreement of sales deed in which

1) B has to cancel the appeal before 1 month.

2)A has to pay B in three months and get he sale deed registered by B.

If B withdraws appeal from the appeal court can A be able to approach lower court and ask the court to execute its decree which was stayed by appeal court ?

if yes how can B secure his bona fides?

Withdrawal of Appeal not necessary. Both of you can enter into a compromise decree in appellate curt itself and terms of compromise will bind both parties. Good wishes.