One Word Substitutes Questions in English

(A) The term $Windfall$ refers to an unexpected piece of good fortune or an unexpected gain,often in the form of money or a sudden advantage.
$Treasury$ refers to the funds or revenue at the disposal of a government or organization.
$Turnstile$ is a mechanical gate consisting of revolving horizontal arms fixed to a vertical post,used to control the passage of people.
Therefore,the correct substitute is $Windfall$.

(C) The term 'Insomnia' refers to a sleep disorder in which a person has difficulty falling asleep or staying asleep.
- 'Amnesia' is the loss of memory.
- 'Nocturia' is the condition of waking up frequently during the night to urinate.
- 'Diurea' is not a standard medical term,though 'Diuresis' refers to increased production of urine.
Therefore,the correct word for someone who is not able to sleep is 'Insomnia'.

(C) The word 'tangible' is defined as something that can be touched or felt physically.
- 'Intangible' refers to something that cannot be touched or grasped.
- 'Contingent' refers to something subject to chance or dependent on other factors.
- 'Intact' means not damaged or impaired in any way.
Therefore,the correct substitute for 'perceptible by touch' is 'tangible'.

(B) The medical study of the skin and its disorders is known as $Dermatology$.
- $Genealogy$ is the study of families and the tracing of their lineages and history.
- $Oncology$ is the branch of medicine that deals with the prevention,diagnosis,and treatment of cancer.
- $Histology$ is the study of the microscopic anatomy of cells and tissues of plants and animals.
Therefore,the correct option is $B$.