Numbers - General Aptitude

Q1:

(12345679 x 72) = ?

A 88888888

B 888888888

C 898989898

D 9999999998

ANS:B - 888888888

12345679 x 72 = 12345679 x (70 +2)
  = 12345679 x 70 + 12345679 x 2
  = 864197530 + 24691358
  = 888888888