Assertion(A) : Two systems which are both in thermal equilibrium with the third system are in thermal equilibrium with one another.
Reason(R ) : The heat flows spontaneously from a system at high temperature to a system at low temperature.

Options

A. Both `A`and `R` are true and `R` is the correct explantion of `A`
B. Both `A`and `R` are true and `R` is not a correct explantion of `A`
C. `A` is true but `R` is false
D. `A` is false but `R` is true

Answer

A