Consider the following statements about mechanism of body heat loss:
1. The heat lost by human body to the surroundings mainly by convection and radiation.
2. Sensible heat loss and latent heat loss are two main component of human body heat loss to the surroundings.
3. Evaporative losses tends toward zero during winter season.
4. Sensible heate component of human body heat loss depends on the difference in water vapour pressures.
Which of the above statements is/are correct?