The orbital which is the largest in size is 4s.
Hence option (B) is correct.
The shape of s-orbital is spherical around the nucleus of the atom. S-orbital have the probability to find the electrons at a given distance which is equal in all the directions.
Now lets check all options one by one
Option (A): 2s is a larger sphere than 1s but not 4s.
So, option A is incorrect.
Option (B): Here 1s is a small sphere, 2s is a larger sphere, 3s is more larger than 2s and 1s and 4s is the largest orbital from all of these.
So, option B is correct.
Option (C): 1s is smallest sphere from all of these.
So option C is incorrect.
Option (D): 3s is also smaller than 4s orbital.
So option D is incorrect.
Option (E): All the s-orbital have the same shape which is spherical not same size.
So option E is incorrect.
Thus, from above conclusion we can say that the orbitals which is largest in size is 4s.
The correct answer is option (B).
Learn more about the Orbitals here: https://brainly.com/question/11793076
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