Hi Akanksha,
Hopefully by now your problem would have been resolved, as you have posted the same almost a year back.
However just wanted to tell you, that if difficult tasks are coming your way, its only you who gets the benefit, and your junior gaining all the sympathy, is just loosing onto time. So welcome any difficult tasks with an open mind.
In my previous company, the CEO himself had mentioned that each day that you are working in the present company is honestly not for the company nor for society or country...it is simply to add on to the responsibilities in your resume, the work you do, today, is going to proudly be showcased by you in the next interview.
So think about it and take things positively.