"Outside the Church there is no salvation" (BTW, this heading is from the Catechism of the Catholic church itself. Just before point 846.)
846
Basing itself on Scripture and Tradition, the Council teaches that the Church, a pilgrim now on earth, is necessary for salvation: the one Christ is the mediator and the way of salvation; he is present to us in his body which is the Church. He himself explicitly asserted the necessity of faith and Baptism, and thereby affirmed at the same time the necessity of the Church which men enter through Baptism as through a door. Hence they could not be saved who, knowing that the Catholic Church was founded as necessary by God through Christ, would refuse either to enter it or to remain in it.336
I do not see the answer here
In any case, this is written to catholics
There is nothing in the Church that says that unless one is catholic they are not going to heaven
It is a lie
I tried! :-)