Consider statements about human diseases: 1. Influenza is caused by a virus. 2. Leprosy is caused by a fungus. 3. Malaria is transmitted by Anopheles mosquito. Which are correct? MCQ with Answer and Explanation

Explanation:
Functional residual capacity (FRC) is the volume of air in the lungs at the end of a normal expiration (ERV + RV). It prevents alveolar collapse and buffers gas concentrations. Vital capacity is max exhaled after max inhalation, total lung capacity is max air lungs can hold, inspiratory capacity is max inhaled after normal exhalation.

Explanation:
Cuscuta (dodder) is a holoparasite, lacking chlorophyll, and derives nutrients from the host plant via haustoria. Therefore, A is true but R is false.

Explanation:
Immunoglobulin G (IgG) is the most abundant antibody in blood plasma, providing long-term immunity and crossing the placenta. Immunoglobulin E (IgE) is present in small amounts and binds to mast cells, triggering the release of histamine during allergic reactions. Immunoglobulin A (IgA) is predominantly found in mucosal secretions like saliva, tears, and breast milk, providing localized mucosal immunity. All statements are correct.