'A' resides at Shimla, 'B' at Kolkata and 'C' at Delhi. A, B & C being together at Banaras. B & C make a joint promissory note, payable on demand and delivered to A. A may sue B & C
1
At Banaras, where the cause of action arose
2
At Kolkata where B resides.
3
At Delhi where C resides.
4
All of the above