Given the image and the previous explanation, the correct answer is:
Understanding the Reaction:
The reaction of propyl magnesium bromide (C3H7MgBr) with CO2 followed by acid hydrolysis is a standard Grignard reaction that produces a carboxylic acid. In this case, it forms butanoic acid.
Analyzing the Options:
The product butanoic acid has the structural formula CH3CH2CH2COOH, which can also be written as C3H7COOH.
Conclusion:
Among the given options, option (A) C3H7COOH correctly represents the product of this reaction.
Final Answer:
The correct answer is (A) C3H7COOH.
Convert Ethanal to But-2-enal
Write structure of the products of the following reactions: 
If vector \( \mathbf{a} = 3 \hat{i} + 2 \hat{j} - \hat{k} \) \text{ and } \( \mathbf{b} = \hat{i} - \hat{j} + \hat{k} \), then which of the following is correct?