Correct Answer: Option B

Explanation

The salt that is slightly soluble in water is CaSO\(_4\) (Calcium Sulfate). 

• AgCl (Silver Chloride): This is considered very slightly soluble or nearly insoluble in water due to its strong ionic bonds. 
• Na\(_2\)CO\(_3\) (Sodium Carbonate): This is highly soluble in water as it is a sodium salt. 
• PbCl\(_2\) (Lead Chloride): While considered slightly soluble, it has a lower solubility compared to CaSO4.

There is an explanation video available below.

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