The sum of first three common multiples of and is
Step 1: Multiples and Common multiples
Step 2: Explanation for correct answer
Option (c):
Find the common multiples of
LCM of and
Common multiples are .
Sum of common multiples
Sum of common multiples
Thus, option (c) is the correct answer.
Step 3: Explanation for incorrect answers
Option (a):
Option (b):
Option (d):
By determining the sum of first three common multiples of and is .
Thus, option (a), (b) and (d) are incorrect answers.
Hence, option (c) is the correct answer.