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: 

A ladder of fixed length \( h \) is to be placed along the wall such that it is free to move along the height of the wall.
Based upon the above information, answer the following questions:
(iii) (b) If the foot of the ladder, whose length is 5 m, is being pulled towards the wall such that the rate of decrease of distance \( y \) is \( 2 \, \text{m/s} \), then at what rate is the height on the wall \( x \) increasing when the foot of the ladder is 3 m away from the wall?