Analogy Test-1

Radio helps in communication similarly cars help in commuting. 
Other options are not suitable as the options do not tell their use.

Stubborn is an adjective for a person or personality and resistance is the trait shown by that personality.
 Similarly, avarice which is an adjective for a person 's mind and greed is the important trait of that mind.

The outer body of many fish is covered with scales similarly the outer body of man is covered with skin.

The question follows this pattern - cause: negative effect of cause.
So the most suitable option is A.

The correct option is C as train travels on track similarly bullet travels in a barrel.

Iron ore is main element of steel, similarly Bauxite ore is the world 's main source of aluminum.

As Asthma is a disease of Lungs similarly Conjunctivitis is a disease of Eyes.

• Chivalry is “the combination of qualities expected of an ideal knight, especially courage, honor, courtesy, justice, and a readiness to help the weak.”The word is associated with the medieval institution of knighthood ”when “knights 'and gentlewoman 's behaviors were governed by chivalrous.
   
• On the other hand,a traitor is a person who betrays someone or something, such as a friend, cause, or principle. Simple answer is you betray a person i.e. you go against the trust reposed by someone, while a traitor does something against national security. Betrayal is against a person and “traitor ”is against the country.

Thunder is caused by lightning. Similarly, viruses cause infection. Viruses infect a host by introducing their genetic material into the cells and hijacking the cell 's internal machinery to make more virus particles.

Romance is associated with love and hence with lovers whereas belligerence means a tendency to fight or to have a war and in option C enemies have belligerence.