In a school, the following codes were used during physical exercise period. '1' means "start walking", '2' means "keep standing" '3' means start running at the same stop", '4' means "sit down". How many times will a student who performs the following sequence without error from the beginning or the end has to sit down?
`"1 2 3 4 2 3 1 4 4 3 2 2 1 2 4 3 1 4 4 1 2"`

Options

A. 2
B. 3
C. 4
D. 5

Answer

C

Explanation

The given sequence of codes used during physical exercise:

Therefore, Required no. of times = 4.
[ `:.` .4. means .sit down.]