The following observations are made while testing aggregate for its suitability in pavement construction:

1. Mass of oven-dry aggregate in air $=1000$ g
2. Mass of saturated surface-dry  aggregate in air $=1025$ g
3. Mass of saturated surface-dry  aggregate under water $=625$ g

Based on the above observations, the correct statement is

1. bulk specific gravity of aggregate $=2.5$ and water absorption $=2.5 \%$
2. bulk specific gravity of aggregate $=2.5$ and water absorption $=2.4 \%$
3. apparent specific gravity of aggregate $=2.5$ and water absorption $=2.5 \%$
4. apparent specific gravity of aggregate $=2.5$ and water absorption $=2.4 \%$