Choose the option that arranges the sentences into a coherent paragraph. (i) The results were released three weeks later. (ii) The candidates sat the examination in May. (iii) Those who passed were invited for screening in July. (iv) Before the examination, they had registered online in March.

The events run from March to July: online registration, the examination in May, results three weeks later, then screening in July. The sentence beginning 'Before the examination' must come first because it describes the earliest event, and the results cannot be released before the examination is sat.