IUPAC name of the following compound (P) is:

IUPAC Nomenclature Rules for Cyclic Compounds:

1. Identify the parent ring (cyclohexane)
2. Number the ring to give substituents the lowest possible locants
3. List substituents in alphabetical order (ignoring prefixes like di-, tri-)
4. Use commas between numbers, hyphens between numbers and words

Step 1: Identify substituents

• Two methyl groups (gem-dimethyl)
• One ethyl group

Step 2: Alphabetical order

• Ethyl comes before Methyl alphabetically

Step 3: Numbering Follow the lowest set of locants rule

• Position 1: Two methyl groups (gem-dimethyl → 1,1-dimethyl)
• Position 3: Ethyl group

Step 4: IUPAC Name $\text{3-Ethyl-1,1-dimethylcyclohexane}$ IUPAC name: 3-Ethyl-1,1-dimethylcyclohexane

$\boxed{\text{Answer: (b) 3-Ethyl-1,1-dimethylcyclohexane}}$