Correct Answer - Option 2 :
6:40 pm
Time required to complete each assignment = 40 minutes.
No. of subjects = 5
Thus, time required to complete 5 assignments = 40 × 5 = 200 minutes = 3 × 60 + 20 = 3 hours 20 minutes.
Now. 10 p.m. - 3 hours 20 minutes = 6. 40 p.m.
Therefore, Muskaan should latest begin by 6. 40 p.m so that she can start and complete her homework in time for the programme.