Question

explain how this answer come​ plzzzzz

Answer 1

Answer:

Angular momentum of election is quantized . Means it cant have all values , only specific values are possible .

See it like Angular momentum is in closed packets each h/2π . Packets cant be open so only possible values of L are integer multiples of h/2π .

In short

Just divide h/2π in each value and see it is integer . If yes then the value is possible .