Characteristic flavours and aroma of cabbage are caused due to ----------- which protects these plants from pests.

Step-by-step solution

Cabbage belongs to the Brassicaceae family, which is known for producing sulfur-containing compounds called glucosinolates. These compounds are responsible for the characteristic pungent flavour and aroma of cabbage, mustard, and related vegetables. They also act as a natural defense mechanism to protect the plants from herbivores and pests. Lysergic acid is an alkaloid found in ergot fungi, di-acetyl morphine is a synthetic opioid (heroin), and interleukins are cytokines involved in the immune system. Answer: gluc