Read the following Assertion and Reason and choose the correct option. Assertion: Anti-histamine drugs are used to enhance the symptoms of allergic reactions. Reason: Anti-histamine drugs help in reducing the symptoms of allergies by counteracting the effects of histamine.

Step-by-step solution

Memory-based acquired immunity evolved in higher vertebrates based on the ability to differentiate foreign organisms (e.g., pathogens) from self- cells. While we still do not understand the basis of this, two corollaries of this ability have to be understood. One, higher vertebrates can distinguish foreign molecules as well as foreign organisms. Most of the experimental immunology deals with this aspect. Two, sometimes, due to genetic and other unknown reasons, the body attacks self-cells. This results in damage to