On May 1, First Bank perfected a security interest in Debtors inventory. On June 1, Bob bought an item of the secured inventory from debtor for cash in the ordinary course of business, On July 1, Second Bank acquired a perfected security interest in Debtors same inventory. In this case:

	a.	Bob took the item of inventory subject to First Banks security interest.
	b.	First Bank has a security interest in the proceeds received from the sale of inventory to Bob.
	c.	First Banks security interest has priority over Second Banks security interest.
	d.	b and c