Here's the question in my book (see picture)
Option A is a standard reaction which gives a carboxylic acid.
Option B is definitely wrong because an acid base reaction will take place and CH4 will be formed after the first step. CO2 will not react with the methane gas.
So without knowing about option C, I can safely tick option A. But what happens in option C? Here's the solution provided in the book.
Why cannot a carbonyl group and Grignard reagent be present in same substance? Also, what will be the reaction?