Wild animals are commonly divided into groups with similar characteristics. The two categories used for mammals are:

Clinical symptoms of hydrocephalus include

a. Headache b. Nausea and vomiting c. Papilledema d. All of the above

Indicative or facing leads for the anterior myocardial infarction are:

A) V3 and V4 B) V5 and V6 C) II, III, and aVF D) I and aVL