A camera always has

Correct Answer: Banks

Explanation:

River can be without Delta , Tributaries , Boats and Fishes. A river can be called river without Banks. So banks are the mandatory for a river.

Correct Answer: Workers

Explanation:

A factory can run without electricity and with coal power or with any other power sources. Chimney is not mandatory for a factory. File are also not mandatory component for factory. Sellers are required but not mandatory. The most important component for factory is workers. If workers will be not there then factory will be shutdown and will not called factory without workers.

Correct Answer: Story

Explanation:

Drama can play with anyone, Director is not mandatory and spectators are also not mandatory. Hence Drama cannot be a drama without Story. Story is the must component of a Drama.

Correct Answer: Engine

Explanation:

Clearly, rails are necessary for the train to move on. Driver alone can move the train. A guard is also necessary for safety. A train is moved for the passengers. But all these do not constituted a train. A train cannot be called so without the engine.

Correct Answer: Petals

Explanation:

A lotus flower always has petals.

Correct Answer: Filament

Explanation:

A bulb can be without Light , Glass, Current and argon. A bulb always have a filament.

Correct Answer:

Explanation:

A Pen cannot be without Nib. A Pen can be without Tube, Ink, Holder and Cap. So a pen have always the mandatory component is NIB.

Correct Answer:

Explanation:

A Dead can have bones but No movement.

Correct Answer:

Explanation:

A man can be without Teeth, Feet, Eyes and Hands but can't be without heart.

Correct Answer: Blades

Explanation:

Switch, Regulator, Wire and Current is the component for fan but not mandatory. Blades are the mandatory component for the Fan.