In the given figure shown here
L and
H show the lowest and highest point respectively.
At point L: T1 acts towards the centre of the circle and mg acts vertically downwards.
Now net force on the stone at the lowest point in the downward direction =mg−T1
At the point : Both T2 and mg act vertically downward towards the centre of the vertical circle.
Again the net force on the stone at the highest point in the downward direction =T2+mg
Hence option (a) is the correct alternative.
![382190_419674_ans_63178c29311f4bb7960a442be3e6871f.PNG](https://search-static.byjusweb.com/question-images/toppr_ext/questions/382190_419674_ans_63178c29311f4bb7960a442be3e6871f.PNG)