Which organ of the human body is affected by the Alzheimer’s disease?

The organ of the human body directly affected by the disease of hepatitis is –

Which organ of the body is affected most on keeping fast for a long time?

Which of the following human organ is affected by the consumption of aflatoxin food adulterant?

Which of the following disease is caused by a virus?

Which part of human body is infected by the virus causing Japanese encephalitis?