n–3 PUFA is present in all except –
Mustard oil
Corn oil
Fish oil
Groundnut oil
POLYUNSATURATED FATTYACEDS 

Polyunsaturated fatty acids have more than one double bond. According to the position of first double bond they or divided into

1)   n-3 fatty acids or ω-3 fatty acids or omega-3 fatty acids

This are long-chain polyunsaturated fatty acids, with first double bond beginning at the third carbon atom (when counting form the methyl end of fatty acid).
Example are α- linolenic acid, Timnodonic (Eicosapentaenoic) acid, cervonic (Docosahexaenoic acid).
Rich sources → wheat, bajara, mustard, fish, lobia, rajmah, black gram, soybean, green leafy vegetables.

2)   n-6 or ω-6 or omega-6 fatty acids

First double bond begins at the 6th carbon atom.
Examples Linoleic acid, Arachidonic acid, γ-linolenic acid.


Rich sources → Groundnut oil & corn oil

Coming back to question

Both groundnut oil and corn oil are devoid of (0-3 fatty acids.
However, corn oil has trace amount of w-3 fatty acids.
So, best answer of this question is groundnut oil.

Following information have been added in 21st/e of Park

The WHO/FAO expert Group on diet, nutrition and prevention of chronic diseases endorse that qualitative composition of fats in the diet has a significant role to play in modifying risk factors for CHD and set the following ranges for population nutrient goals (% of energy) : -


Total fat intake, 20-30% of total energy intake (at least 20% energy is consistent with good health).
Saturated fatty acids, less than 10% of total energy intake.
PUFAs, 6-10% of total energy intake (minimum of 6%). ω-6 should be about 5-8% and ω-3 should be about 1-2%.
Trans fatty acids should be less than I% of total energy intake.
Cholesterol should be less than 300 mg a day.


It is worth noting here that above values are for prevention of CHD. However, minimum intake levels for essential fatty acids to prevent deficiency symptoms are estimated to be 2.5% of total intake for lenoleic acid and 0.5% for Lenolenic acid (ALA).