This is from TSA Oxford 2021 section 1. I know this question has to do with permutation, but I can’t figure out how to solve it. Please help 
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Hi!
is the answer C)?
In combinations the order of the objects don’t matter (ABC=ACB…)
So we can only have 4 combinations
Ba E T Tm
Ba E T B
S E T Tm
S E Tm B
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i also got C in this question when u do the combos you only have 4 options
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Yes the answer is C. Thanks!