"Pheromones" in insects are secreted from
A. Endocrine glands
B. Exocrine glands
C. Corpus allatum
D. Digestive tract

Hint: The chemical substances that are secreted by the insects as sexual attractors are known as Pheromones. These are generally used to entertain insects, and they anticipate populations. When the insects infesting are low, the insects are caught by pheromone traps. In general, the Pheromones are generally wind-borne. However, they can be placed on vegetation, soil, or any other items.

Complete answer:
 The exocrine glands secrete pheromones in insects.
-Chemical communication plays a significant role in the lives of many social insects like termites and ants.
-Various kinds of pheromones(specific-specific chemical messenger) have been explained, specifically, those involved in recognition, recruitment, alarm, and territorial behaviours.
-Pheromones properties include specificity(which can have chemotaxonomic uses), and activity in minutes(requiring sensitive methods for chemical analysis).
-Pheromone producing glands considered by exocrine structures is the Dufour, pygidial, poison, mandibular, frontal, salivary or labial, tergal, and sternal glands.
So, the correct answer is “Option b”.

Additional Information:
Exocrine glands are located all over the body of an insect.
Pheromones convey different signals when found in combinations or concentrations.
Some plants, vertebrates, and ciliates also communicate by using pheromones.
Pheromones contained in the trap are used to detect and monitor pests in residential areas and agriculture.

Note:
Pheromones are the chemical agents that are used by insects and various other animals to communicate with one another. Insects send the chemical signals to helpmates in attraction, find food, or warn others of predators. The exocrine glands secrete pheromones in insects. Exocrine glands are located all over the body of an insect. Chemical communication plays a significant role in the lives of many social insects like termites and ants.