Which of the following is an arithmetic sequence?

Here is your answer

A. 1,3,5,7,9,11,

REASON :

In an AP their is a common difference between two consecutive terms.

i.e. t2-t1=t3-t2=t4-t3== constant

The option A satisfies above condition.

HOPE IT IS USEFUL

$12. that is my answer.

b.-4 units

all you   do is count how many times you move