Which way is the correct way of copying (deepcopy) object_1 to object_2? (A is a class)

Question

class A:

def __init__(self):

self.x

self.y

a)object_1 = A()

object_2.x = object_1.x

object_2.y = object_1.y

b) object_1 = A()

object_2.x = object_1.x

object_2.y = object_1.y

#OR

object_1 = A()

object_2 = object_1

c) object_1 = A()

object_2 = A()

object_2.x = object_1.x

object_2.y = object_1.y

d) object_1 = A()

object_2 = object_1