Alfa Cosmetics$$ R&D department has come up with four different products, codenamedS, T$,$ U and V$.$ The company has resource to develop and market only one of them. Theestimated life$-$long net profit for each product is estimated to be $10$bn for S$,16$bn forT, $29$bn for U and $-3$bn for V$.$ What is the opportunity cost of product U$?$a$.10$bn$.$b$.16$bn$.$c$.-3$bn$.$d$.32$ bn$.$