Answer:
Option B.
Step-by-step explanation:
Intersection of two sets is a set of common terms in both the sets.
Now the two sets are P = {1, 2, 3, 4}, Q = {4, 5, 6, 7} and R = {7, 8, 9, 10}
Common terms in P and Q,
P∩Q = {∅}
Now the common terms in R and (P∩Q).
(P∩Q)∩R = {∅}
Answer is a null set.
Option B, will be the answer.
