If i am in a class and i need to go out to pray dhuhr.but the teacher is a kaafir and i have a fear that if i tell him i need to go out to pray he may not let me go.in this case is it permissable to lie to him saying that i am sick or that i need to go to the toilet and then quickly go out and offer prayers and come back? is this permisible since i will become a kaafir if i miss prayer deliberately.and lying is the only option?if this is not permissible what should i do?