Identify the correct action of the islamic bank in the following case study: Mr. Bilal made a binding promise to an Islamic bank that he would buy a van from the latter through a murabaha transaction. Based on that promise, the Islamic bank collected urboun of US$500 from him, and bought a van from a vendor for US$30,000 in cash. After the van was delivered to the Islamic bank, Mr. Bilal decided not to buy it. The Islamic bank then sold the van to John in a forced sale, for US$29,800 in cash.

a. The Islamic bank should return US$200 to Bilal

b. The Islamic bank should return US$500 to Bilal.

c. The Islamic bank should not return any money to Bilal.

d. The Islamic bank should not return any money to Bilal but must pay US$200 to John as a gift to be thankful to John for being willing to buy the van.