Dear aspirant,
As you have mentioned that you have got 120 marks in the manipal entrance exam in 2021, so as far as my knowledge for a safe side a 145+ is a must for cse branch at cse. For IT or ECE branch it can be lower. But you should aim for 140 atleast to be on a safer side for branches like cse and it.
But it is not final because the dynamics changes every year depending on certain factors like difficulty level of the paper, number of seats in the college and also the number of candidates.
For previous year cut off you can check out the link given below -
https://engineering.careers360.com/articles/met-cutoff
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