Correct option is C
Given:
Ansh takes 18 minutes to complete one round.
Siddhi takes 12 minutes to complete one round.
Solution:
they meet at the starting point when time taken by them is LCM of their indiviual time taken.
so LCM of 18 minute and 12 minute = 36 minute
at 36th minute Ansh complete = 2 round
at 36th minute Siddhi complete = 3round