Question: Consider following query: SELECT DISTINCT P1. PRODNR, PL. PRODNAME FROM PRODUCT P1, SUPPLIES Si WHERE P1.PRO DNR = S1.PRODNR AND 1 S1.SUPNR AND P1. PRODNR=S2.

Consider following query: SELECT DISTINCT P1. PRODNR, PL. PRODNAME FROM PRODUCT P1, SUPPLIES Si WHERE P1.PRO DNR = S1.PRODNR AND 1 S1.SUPNR AND P1. PRODNR=S2. PRODNR) ORDER BY PRO DNR The query retrieves: a. The number and name of all products that can only be supplied by one supplier. b. The number and name of all products that cannot be supplied by any supplier. c. The number and name of all products that can be supplied by more than one supplier. d. The number and name of all products that can be supplied by all suppliers

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