Making anti-viral drugs is more difficult than making anti-bacterial medicines because

Which one of the following is not a viral disease?

Complete the given table:

Disease	Causative organism	Mode of transmission
Dengue fever	$... (a) ...$	$... (b) ...$
$... (c) ...$	Vibrio cholerae	Contaminated food and water
$... (d) ...$	$HIV$	$... (e) ...$
Common cold	Virus	$... (f) ...$

Which of the following is not an infectious disease?

Priya's mother uses iodised salt at home. One day while cooking,Priya asked her mother about iodised salt. She said people who do not use iodised salt suffer from deficiency of iodine which leads to goitre and hypothyroidism.
$(a)$ What are the physical symptoms of goitre and hypothyroidism?
$(b)$ How will you inform others about the importance of iodised salt?
$(c)$ Is iodine a metal or a non-metal?
$(d)$ What are the physical properties of iodine?
$(e)$ What is the difference between iodised salt and normal salt?

State whether the following statement is true or false:
High blood pressure and cancer have mostly external causes and are generally caused by infectious agents.