When the wicked couple sprinkled the ashes, the correct answer is option 'A', which means that the people who were present experienced sneezing and choking. This can be inferred from the given options and the context of the question.

Explanation:
1. The wicked couple: The question mentions a wicked couple, implying that they have malicious intentions or are up to no good.

2. Sprinkling the ashes: The couple sprinkles the ashes, which indicates that they are using the ashes for some purpose, possibly in a magical or supernatural way.

3. Option 'A' - Sneezing and choking: The correct answer states that sneezing and choking occurred when the ashes were sprinkled. This suggests that the ashes may have had some irritating or harmful properties, causing discomfort to those around.

4. Blossom (Option 'B'): This option does not align with the context of the question. Sprinkling ashes would unlikely result in blossoms, as ashes are typically associated with destruction or remnants.

5. Changed into flowers (Option 'C'): This option also seems unlikely based on the context. Sprinkling ashes would not typically transform people into flowers, as ashes are remnants of burnt material.

6. None of these (Option 'D'): This option is incorrect because the question specifically asks for what happened when the ashes were sprinkled. The options provided may not accurately represent the outcomes, but option 'A' aligns closest with the context.

In conclusion, when the wicked couple sprinkled the ashes, sneezing and choking occurred. The exact reasons for the sneezing and choking are not mentioned in the question, but it can be inferred that the ashes had some irritating or harmful properties.