'start walking', '2' means 'keep standing', '3' means 'start running at the same
spot', '4' means 'sit down'. How many times will a student who performs the
following sequence without error from the beginning to the end have to sit down ?
1 2 3 4 2 3 1 4 4 3 2 2 1 2 4 3 1 4 4 1 2
Answer : Option C
Explanation :
Clearly, the student will have ti sit down at the places marked by boxes :
1 2 3 [4] 2 3 1 [4] [ ]4 3 2 2 1 2 [4] 3 1 [4] [4] 1 2