Few statements are given below in reference with Thermodynamics, Which of the following option shows all correct statements for it ?_ans_key_(I) Amount of energy is constant._ans_key_(II) During transfer of energy some amount of energy is converted in to heat._ans_key_(III) Free energy = energy which can do work._ans_key_(IV) At each tophic level amount of stored energy reduces.

• A. (I) and(II)
• B. (III) and (iv)
• C. (i) and (iv)
• D. All of the given