What is the final product when 3-Methyl-1-butanol reacts with two moles of nascent oxygen in the presence of potassium dichromate in acidic medium?

3-Methyl butanal  3-Methyl butanoic acid  2-Methyl butanoic acid  Pentanoic acid

3-Methyl butanoic acid

3-Methyl-1-butanol reacts with two moles of nascent oxygen in the presence of potassium dichromate in acidic medium to give 3-Methyl butanoic acid.