What is the best definition of etc reaction

Electron transport chain is a series of biochemical reactions in which high energy molecules are produced via redox reactions that is oxidation and reduction reactions take place simultaneously.

It is also the primary step for the production of ATP molecules and is carried out in the mitochondria of cells. Electron transport chain is an important step of cellular respiration as it yields high energy ATP and NADPH molecules.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.