Question

Teeth conducting poison in a snake are called as
A. Incisors
B. Canines
C. Heterodont
D. Fangs

Answer 1

Hint: Snakes inject the venom in their prey through long grooved teeth that are hollow and distinct from the general set of snake teeth. Snakes have modified pleurodont set of teeth.

Complete answer:
Snakes have a generalised six row teeth set. The lower jaw has one row on either side while the upper jaw has two rows on either side. The dentition in snakes is highly species specific. Venomous species of snakes sport a specialised type of teeth called fangs. Fangs are enlarged, hollow, sharp teeth located on the upper jaw, called the maxilla.
Fangs could be anteriorly positioned or posteriorly positioned depending upon the clade and are categorised into front fanged group and rear fanged group. There are four groups of snakes based on the type of dentition. Aglyphous snakes are mostly the non venomous (or mildly venomous) snakes. They have no modified or specialised set of teeth but just the homodont rows of simple teeth.
Opisthoglyphous snakes are the rear fanged snakes that have their fangs on the back of maxillae while Proteroglyphous snakes are front fanged snakes with reduced maxillae and long fangs. The most developed fangs are those of solenoglyphous snakes. Their fangs are grooved inwards.
Fangs are connected to the venom gland of snakes at the back of their head. At the time of attack, venom is conducted from the glands to the fangs through a duct, which is then injected into the prey through the tiny hole at the end of the fangs.

The correct option is D.

Note: Snakes do not have conventional molars, premolars, canines and incisors. Either the teeth are homodont or, in case of certain types of snakes, specialised teeth in the form of fangs.