Answer:
d. End product is that product with a ketone and carboxylic acid.
Step-by-step explanation:
![{ \sf{NaBH_(4) : }}](https://img.qammunity.org/2022/formulas/chemistry/college/t9r46sqfzmx4i40tmj58lzfacxl1dsnd66.png)
Sodium borohydride is a reducing agent, it reduces the ketone to a primary alcohol.
![{ \sf{H _(2) O \: and \: H {}^( + ) }}](https://img.qammunity.org/2022/formulas/chemistry/college/snv1zamglbdhjma7oqr2x4bg9lypdbog70.png)
Then acidified water is an oxidising mixture which reverses the reduction reaction.