4 moles of CO and 2 moles of O2 are reacted, then what type of

4-moles-of-co-and-2-moles-of-o2-are-reacted-then-what-type-of

4 moles of CO and 2 moles of O2 are reacted, then what type of reactant O2 is?

A. Limiting reagent

B. Excess reagent

C. Can’t say

D. None of the mentioned

I had been asked this question in unit test.

My doubt is from Stoichiometry Applications Terminology topic in chapter The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering

The correct choice is D. None of the mentioned

The explanation is: The balanced chemical reaction is 2CO + O2 -> 2CO2, => If 4 moles of CO are reacting, 2 moles of O2 will react, this means none of the two is limiting reagent or excess reagent.