I'm guessing number 1 because that seems physically impossible :O
Mine are:
1. My two siblings and I share an identical birthmark - same shape, same place - right above the heart.
2. I have a condition called synesthesia and can look at a number or letter and see a particular colour.
3. I can speak two languages fluently (English & Hindi), and bits of another language (German).
I was gonna say #1 cos that seems super unlikely but it's probably a trick question so #2?
Nope, number 3 was the lie!
I can't speak Hindi fluently at all, I only know a few words. Though I can speak English fluently, and I do know bits of German.
I would say 1 because 2 and 3 make sense, while 1 could be variable.
1. My favourite colour is blue
2. I achieved 97% in my Maths Ext 1 Trial Paper
3. I once fell asleep while watching Inception
I hope number 3 is true because the irony of that would be hilarious!
Therefore I'm going to guess number 2 - not because I doubt your intelligence, but because that seems pretty hard!
Can I go again?
1. My favourite vegetables are potatoes.
2. My favourite colour is yellow.
3. My favourite number is 7.