Which of the following is/are correct regarding the Planning Commission? 1. Deputy Chairman has always been a whole-time member. 2. Some Union Cabinet Ministers have been part-time members. 3. Members of the Planning Commission enjoy the status of a Cabinet Minister. 4. Number of whole-time expert members has varied. Select the correct answer using the codes given below:

• A.  2 and 4           
• B.  Only 4
• C.  1 and 3           
• D.  1, 2 and 4