No bill of attainder or ex post facto law shall be passed is True.
Step-by-step explanation:
The ex-post facto is the law for changing the aftermath of legal judgements. The above statement is true it is written in the constituent of United States that No bill of attainder or ex post facto law shall be passed.
Dr. Babasaheb Ambedkar drafter of Indian constitution also take this law in the Indian Constitution. This law makes illegal action when it was committed legal. It increases the penalty of accuse. It changes the consequences of an action which of taken before the crime.