Questions

In economics we study that, if the price of a good increases the demand in its quantity decreases or the demand for its complimentary good increases.

For example, if the rice of a good increased by 5%, the demand in its quantity decreases by 10% approximately.

Indian states celebrating their Statehood Day on 21st Jan are Manipur, Tripura & Meghalaya (1972).

Auto-immune disease :: Sometimes, due to genetic and other unknown reasons, the body attack self-cells. This results in damage to the body and is called auto-immune disease.

From the options,

-> Rheumatoid arthritis is an autoimmune disorder in which antibodies are produced against the synovial membrane and cartilage.

-> Vitiligo causes white patches on skin also characterised as autoimmune disorder.

-> Psoriasis is a skin disease that causes itchy or sore patches of thick red skin and is also autoimmune.

-> Alzheimer's disease is a chronic neurodegenerative disease. Alzheimer's disease is due to deficiency of neurotransmitter acetylcholine.

Hence, Alzheimer's is not the auto-immune disease.