Hello uncle, We all are doing well here. I hope you all too would be doing great there. Recently, we have celebrated the Golden Jubilee Celebration of Grandfather and Granny's wedding with immense joy and pleasure. We had planned a super-surprise for them in the form of arranging destination wedding for them at Goa with all the rituals. We all had surprised them with our presence and this grand surprise which left them astonished as they could never expect such a gift from their children and grandchildren. We all together went there and celebrated their day with the wedding followed by a lovely family dinner, photo-session, and trip for them to their dream location. I know you could not come due to work and thereby, I am sharing this beautiful moment with you along with some pictures enclosed. Pay my regards to aunt and love to Anshul.
It says "my parents or my older sister". The last subject stated is "my older sister" which is singular. And the only choice that's singular is 'was'. So that should be the answer.
