Read the following passage and solve the questions based on it.
An inexperienced Yoga teacher, posing as an expert on yogic exercises (asanas) prescribed a schedule of exercises for a pupil. Choosing from exercises Anubittasana, Bhujangasana, Chakrasana, Dhanurasana, Sukhasana, Tadasana, Ushtrasana and Vyagrasana, the pupil must perform a routine of exactly five different asanas each day. In any day’s routine, except the first day, exactly three of the exercises must be the ones that were included in the routine of the previous day, and any permissible routine must also satisfy the following conditions:
(i) If Anubittasana is in routine. Ushtrasana cannot be done in that routine.
(ii) If Bhujangasana is in a routine, sukhasana must be one of the exercises done after bhujangasana in that routine.
(iii) If chakrasana is in a routine, ushtrasana must be one of the exercises done after chakrasana in that routine.
(iv) The fifth exercise of any routine must be either dhanurasana or tadasana.
If Chakrasana is the third exercise in a routine, which of the following cannot be the second exercise?