The correct IUPAC name of the following compound is, 

1.
The correct IUPAC name of the following compound is,

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

1. 2-Methoxypropanal2. 2-Methoxybutanal3. 3-Methoxybutanal4. 3-Methoxybutanaldehyde

1. 2-ethyl-3-methyl hexane2. 3, 4-dimethyl heptane3. 4, 5-dimethyl heptane4. 3-methyl octane