At hill station, the boiling point of water will be _____.

Less than that at sea level

The correct answer is Option (3) → Less than that at sea level

The boiling point of water decreases with an increase in altitude. Therefore, at a hill station (which is at a higher altitude than sea level), the boiling point of water will be less than that at sea level. This is because the atmospheric pressure decreases with higher altitudes, and boiling point is directly influenced by atmospheric pressure.