Answer: Option (A) is the correct answer.
Explanation:
Pseudoscience is defined as the theories, beliefs, practices etc which are considered to be scientific but there are no basis in scientific fact for all that theories, belief, or practices etc.
Therefore, we can also say that due to lack of scientific evidence or proof they have been rejected.
Thus, we can conclude that the best definition of pseudoscience is that implausible or untestable scientific claims.
