Q. If e is the electricity fraction of the total energy output, m is the electric plant efficiency and n is the steam generator efficiency; the heat added per unit total energy output is given by?

• (A) (1 / m) + ((1 – e) / n)
• (B) (1 / n) + ((1 – e) / m)
• (C) (1 / m) + ((1 + e) / n)
• (D) (1 / n) + ((1 – e) / m)