'Encephalitis' in humans is a viral disease and is transmitted by

How many of the following diseases are caused by viruses?
Mumps,Smallpox,Common cold,Typhoid,Herpes,$AIDS$,Hepatitis-$B$,Pneumonia

Which one of the following is a viral disease that weakens the muscles?

The $Aedes$ mosquito is responsible for the transmission of:

Common cold is caused by

Which of the following diseases are known to be caused by viruses? (In this item one or more of the answers given may be correct. Decide which are correct and mark the answer sheet according to the code)
$1.$ Burkitt's lymphoma
$2.$ Adult $T-$ cell leukemia
$3.$ Phenylketonuria