Question

Select the appropriate option to fill in the blank.

The Ozone depletion depends upon the ultraviolet rays _____ sunlight.

• A. of
• B. by
• C. on
• D. for

Answer 1

The correct option is A of

The given sentence conveys that the Ozone depletion depends upon the ultraviolet rays which is in the sunlight. Therefore 'of' is the suitable answer, since 'of' is used to explain to whom or what an object belongs to. Thus option A is correct. On the other hand 'by' is used to identify the agent performing the action which is not appropriate for this sentence. Hence option B is incorrect. The preposition 'on' is used to indicate something above, while 'for' indicates the occasion in a series. Since the sentence speaks about something belongs to something, 'on' or 'for' are unsuitable in the given context. Thus option C and D are incorrect.

The completed sentence, thus becomes: The Ozone depletion depends upon the ultraviolet rays of sunlight.