The correct option is
D Polyunsaturated fatty acid
PUFA is the abbreviated form of polyunsaturated fatty acid. These are the fatty acids which contain more than one double bond in their carbon structure. This is the group of fatty acids which contains essential oils like the omega-3 fatty acids, omega-6, omega-9 and other conjugated fatty acids. These compounds are required in the diet for the growth and development of animals.
Thus, the correct answer is option A.