Some, all or none of the following statements are right. Answer using the code. (i) A help given or promised to a dancing girl is not tainted with immorality. (ii) Public policy is an unruly ass. (iii) A wife who is entitled to maintenance can give up her right in consideration of a lump sum payment, but the surrender of the right to claim revision of the amount in the context of rising prices would not be opposed to public policy. (iv) A contract for sale of goods whose tenor shows that the price was intended to be paid out of black money is opposed to public policy.