An ideal gas undergoes an isothermal process from some initial state \(i\) to the final state \(đť‘“\).
(a) \(dU = 0 \) (b) \(dQ = 0\)
(c) \(dQ = dU \) (d) \(dQ = dW\)

Choose the correct alternatives:

1. (a), (b), (c) 2. (a), (d)
3. (b), (c), (d) 4. (a), (c), (d)