Which of the following condition for three bodies A, B and C should be satisfied according to the statement of zeroth law of thermodynamics?
1
A, B and C should be in thermal equilibrium and in contact
2
A, B and C should be in thermal equilibrium and not in contact with each other.
3
A, B and C should be in thermal equilibrium
4
A& B in thermal equilibrium and in contact, B & C in thermal equilibrium and in contact then A & C will be in thermal equilibrium