This is going to be most special surprise that Dude has given to II.
Actually he has given quite a few:
Proposal itself was big one.
Cartier ring.
Her birthday surprise with II pendant.
Taking her to his school.
Some make-up stuff of MAC & some branded purse/clutch
Books
Flowers.
Bracelet & being there for Karwachauth
But this tops the list whisk her to Kasauli just clear things and manao his bibi.