Along chain of hydrocarbon bonded to cooh is a acid.
a. formic
b. carbonic
c. amino
d. fatty

Option (d) is the correct answer.

Explanation:

A fatty acid is defined as a long chain of hydrocarbons that consists of a carboxylic group, that is, COOH group at the end of the chain.

General formula of a fatty acid is where n is mostly an even number in many cases.

Fatty acids are also known as aliphatic monocarboxylic acid.

For example, is the formula of stearic acid which is a fatty acid.

Thus, we can conclude that a long chain of hydrocarbon bonded to cooh is a fatty acid.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.

the answer is b   just took the test