IUPAC name of the following compound

1.
IUPAC name of the following compound

1. Cyclopentylethyne2. Ethynylcyclopentane3. Cyclopentylacetylene4. Ethynyl pentane

1. Both are correct2. Both (I) & (II) are incorrect3. Only I is correct4. Only II is correct

1. 3-Ethyl-2, 2, 4-trimethylpentane2. 2, 2, 4-Trimethyl-3-ethylpentane3. 2, 4, 4-Trimethyl-3-ethylpentane4. 3-(1,1-Dimethylethyl)-2-methyl pentane

1. 2, 2, 4, 4 - Tetramethylpentane2. 2, 2 - Dimethyl propane3. 3 - Methyl - 4 - ethylhexane4. 3 - Ethyl - 4 - methylhexane

1. 6-Bromo-3-hydroxybenzonitric2. 2-Cyano-hydroxybromobenzene3. 2-Bromo-5-hydroxybenzonitrile4. 4-Bromo-3-cyanophenol