As regards possessive adjectives and possessive pronouns, fill in the gaps in the sentences below by choosing one of the two options in parenthesis.
A - Is that notebook _______ (your/yours)? B - I encountered _____ (his/theirs) sister at the park last Sunday, can you believe it? C - Has Lucy seen ___ (my/mine) coat?
In the order presented, the gaps are correctly and respectively filled by: