According the the arrhenius theory, which species does an acid produce in an aqueous solution?

Note: Above question is incomplete: Complete question is read as 
According the the arrhenius theory, which species does an acid produce in an aqueous solution?
A) hydrogen ions B) hydroxyl ions C) Sodium ions D) Chloride ion

Correct answer for above question is A) Hydrogen ions

Reason:
According the Arrhenius theory of acid and base, acid generates hydrogen ions in aqueous medium, while bases generates hydroxyl ions in aqueous medium.  
Example of Acid:
HCl(aq)          →          H+(aq)    + Cl-(aq)

Example of Base:
NaOH(aq)           →          Na+(aq)       +     OH-(aq)

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.