Fill in the blank with a suitable article (if needed) :
__________ sugar is a source of many diseases.
Tripura Public Service Commission - 2025,
Answer: D
The answer is No article: Sugar is a source of many diseases.
Sugar here is an uncountable noun used in a general sense, sugar in general, so it takes no article, like Milk is good for health or Water boils at 100 degrees.
A and an cannot be used with an uncountable noun in this sense. The sugar would refer to particular sugar already identified (the sugar in this jar), which does not fit a general statement about health.
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