Consider the following relations A, B and C:
A
| Id |
Name |
Age |
| 12 |
Arun |
60 |
| 15 |
Shreya |
24 |
| 99 |
Rohit |
11 |
B
| Id |
Name |
Age |
| 15 |
Shreya |
24 |
| 25 |
Hari |
40 |
| 98 |
Rohit |
20 |
| 99 |
Rohit |
11 |
C
| Id |
Phone |
Area |
| 10 |
220 |
02 |
| 99 |
2100 |
01 |
How many tuples does the result of the following relational algebra expression contain? Assume that the schema of A u B is the same as that of A.
(A) 7
(B) 4
(C) 5
(D) 9
