Two programmes are asked to write a program to sum the rows of a 2X2 matrices stored in the array A.

Ravi writes the following code (Code A):

for n = 0 to 1

sumRow1[n] = A[n][1] + A[n][2]

end

Rupali writes the following code (Code B):

sumRow1[0] = A[0][1] + A[0][2]

sumRow1[1] = A[1][1] + A[1][2]

Comment upon these codes (Assume no loop-unrolling done by compiler):

Option 1 : Code A will execute faster than Code B.

Option 2 : Code B will execute faster than Code A

Option 3 : Code A is logically incorrect.

Option 4 : Code B is logically incorrect.

Answer: Option 2