Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octance is chemically known as?

• A. ≈í¬±-methyl naphthalene
• B. 2-2-4 tri methyl pentane
• C. 1, 3 butadiene
• D. Tetra methyl ethylene