when a relationship's degree is more than binary (ternary and 4-ary....) and there is more than one arraw then in **literature **it is interpreted in two ways.

**1st interpretation:**

**Since C has arrow it is interpreted as**

for every ABD there is atmost one C [ ABD C]

**Since D has arrow it is interpreted as **

for every ABC there is atmost one D [ABC D]

**2nd interpretation:**

Since C, D have arrows, in this interpretation it is interpreted as AC and AD and BC, BD

Since there are two interpretations if you follow first interpretation then Answer is (**A)** and if you follow 2nd interpretation then it is **(B).**

**Note: Marks are given for A and B**