i 2/2, c 1/1, pm 2/2, m 3/3 The above dental formula represents the dentition of

Analyze the question: The dental formula is written as i 2/2, c 1/1, pm 2/2, m 3/3. This means that on each side of the mouth, the upper and lower jaws have:

• Incisors: 2 upper, 2 lower
• Canines: 1 upper, 1 lower
• Premolars: 2 upper, 2 lower
• Molars: 3 upper, 3 lower

Explain the concept: Dental formula shows the number of each type of tooth on one side of the jaw (upper/lower). Total teeth = (sum of the formula) × 2 for the two sides.

Total per side: upper = 2+1+2+3 = 8, lower = 8, so 16 per side, and 16 × 2 = 32 teeth.

Compare with the options:

• Cow / Sheep: i 0/3, c 0/1, pm 3/3, m 3/3 (32 teeth). They have no upper incisors or upper canines, just a dental pad. This doesn't match.
• Dog: i 3/3, c 1/1, pm 4/4, m 2/3 (42 teeth). This doesn't match.
• Rabbit: i 2/1, c 0/0, pm 3/2, m 3/3 (28 teeth). It has no canines, so this doesn't match.
• Man: i 2/2, c 1/1, pm 2/2, m 3/3 (32 teeth). This matches exactly.

Answer: Humans have 8 teeth per jaw half: 2 incisors, 1 canine, 2 premolars and 3 molars (the third molars are the wisdom teeth). The formula matches man, which is option C.

Exam tip: Remember that humans are the only option here with a canine and a full 2-1-2-3 pattern. Quick eliminators:

• Herbivores like cows and sheep: no upper incisors and no upper canines.
• Rabbits: a gap (diastema) where canines should be.
• Dogs (carnivores): many more teeth, with large canines and carnassials.

You can remember the human formula as 2-1-2-3, which gives 32 teeth in adults.