Ideally, pure drug from a __________ or __________ powder is the best source of active ingredients for preparing a topical product

It is difficult to recognize slight changes in alveolar bone that would indicate early or mild periodontal disease because radiographs represent a two-dimensional view of three-dimensional objects

A) Both statement and reason are correct. B) Both statement and reason are incorrect. C) The statement is correct, but the reason is incorrect. D) The statement is incorrect, but the reason is correct.

The period of ventricular contraction in the heart is called systole

Indicate whether the statement is true or false